कौन सा व्यंजक द्विघात व्यंजक है?
Which expression is a quadratic expression?
#quadratic expression
#degree
#identification
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A (9)
B (5x+7)
C \(4x^3+x\)
D \(3x^2+2x+1\)
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Correct Answer
D. \(3x^2+2x+1\)
Explanation
Simple Explanation
द्विघात व्यंजक में सबसे बड़ी घात (2) होती है। परीक्षा में पहले उच्चतम घात देखें। / A quadratic expression has highest power (2). Exam tip: first check the highest power.
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\(2x^2-5x+8\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(2x^2-5x+8\)?
#coefficient
#quadratic term
#basics
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A (8)
B (-5)
C (2)
D (5)
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Explanation
Simple Explanation
\(x^2\) के साथ लगी संख्या (2) है। परीक्षा में गुणांक को उसके पद के साथ पहचानें। / The number attached to \(x^2\) is (2). Exam tip: identify the coefficient with its term.
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\(x^2+7x+12\) में स्थिर पद कौन सा है?
What is the constant term in \(x^2+7x+12\)?
#constant term
#quadratic expression
#term identification
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A \(x^2\)
B (7x)
C (12)
D (7)
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Explanation
Simple Explanation
जिस पद में चर नहीं होता वह स्थिर पद होता है। यहां स्थिर पद (12) है। / The term without a variable is the constant term. Here the constant term is (12).
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\(4x^2-3x+6\) का मान (x=2) पर कितना होगा?
What is the value of \(4x^2-3x+6\) at (x=2)?
#evaluation
#quadratic value
#substitution
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A (12)
B (20)
C (18)
D (16)
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Explanation
Simple Explanation
(4(2)2 -3(2)+6=16) होता है। परीक्षा में पहले वर्ग का मान निकालें। / (4(2)2 -3(2)+6=16). Exam tip: calculate the square first.
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\(x^2+4x+4\) किस रूप में लिखा जा सकता है?
How can \(x^2+4x+4\) be written?
#perfect square
#quadratic expression
#identity
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A (x(x+4))
B ((x-2)2 )
C ((x+4)2 )
D ((x+2)2 )
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Correct Answer
D. ((x+2)2 )
Explanation
Simple Explanation
\(4=2^2\) और \(4x=2\cdot2x\) है। इसलिए यह ((x+2)2 ) है। / \(4=2^2\) and \(4x=2\cdot2x\). So it is ((x+2)2 ).
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\(x^2-6x+9\) का पूर्ण वर्ग रूप कौन सा है?
What is the perfect square form of \(x^2-6x+9\)?
#perfect square
#negative middle term
#quadratic
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A ((x+3)2 )
B ((x-3)2 )
C ((x-6)2 )
D \(x^2-9\)
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Correct Answer
B. ((x-3)2 )
Explanation
Simple Explanation
\(9=3^2\) और मध्य पद (-6x) है। इसलिए रूप ((x-3)2 ) होगा। / \(9=3^2\) and the middle term is (-6x). So the form is ((x-3)2 ).
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((x+5)2 ) को फैलाने पर कौन सा द्विघात व्यंजक मिलेगा?
Which quadratic expression is obtained by expanding ((x+5)2 )?
#expansion
#binomial square
#quadratic expression
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A \(x^2+5x+25\)
B \(x^2-10x+25\)
C \(x^2+25x+10\)
D \(x^2+10x+25\)
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Correct Answer
D. \(x^2+10x+25\)
Explanation
Simple Explanation
((a+b)2 =a-2 +2ab+b-2 ) से \(x^2+10x+25\) मिलता है। परीक्षा में मध्य पद दुगुना होता है। / Using ((a+b)2 =a-2 +2ab+b-2 ), we get \(x^2+10x+25\). Exam tip: the middle term is doubled.
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((x-4)2 ) का विस्तार क्या है?
What is the expansion of ((x-4)2 )?
#minus square
#expansion
#quadratic
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A \(x^2-4x+16\)
B \(x^2+8x+16\)
C \(x^2-8x+16\)
D \(x^2-16\)
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Correct Answer
C. \(x^2-8x+16\)
Explanation
Simple Explanation
((x-4)2 =x-2 -2\cdot x\cdot4+16) है। इसलिए \(x^2-8x+16\) सही है। / ((x-4)2 =x-2 -2\cdot x\cdot4+16). So \(x^2-8x+16\) is correct.
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((x+3)(x+2)) का विस्तार कौन सा है?
Which is the expansion of ((x+3)(x+2))?
#product expansion
#quadratic expression
#algebra
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A \(x^2+3x+2\)
B \(x^2+6x+5\)
C \(x^2+5x+6\)
D \(x^2+2x+6\)
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Correct Answer
C. \(x^2+5x+6\)
Explanation
Simple Explanation
गुणा करने पर \(x^2+2x+3x+6=x^2+5x+6\) मिलता है। परीक्षा में समान पद जोड़ें। / Multiplying gives \(x^2+2x+3x+6=x^2+5x+6\). Exam tip: combine like terms.
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\(x^2+9x+20\) के लिए ऐसे दो संख्याएं कौन सी हैं जिनका योग (9) और गुणन (20) है?
For \(x^2+9x+20\), which two numbers have sum (9) and product (20)?
#sum product
#quadratic factorisation
#medium
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A (2) और (10) / (2) and (10)
B (4) और (5) / (4) and (5)
C (1) और (20) / (1) and (20)
D (3) और (6) / (3) and (6)
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Correct Answer
B. (4) और (5) / (4) and (5)
Explanation
Simple Explanation
(4+5=9) और \(4\cdot5=20\) है। परीक्षा में मध्य पद और स्थिर पद दोनों मिलाएं। / (4+5=9) and \(4\cdot5=20\). Exam tip: match both middle and constant terms.
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\(x^2-5x+6\) के गुणनखंड कौन से हैं?
What are the factors of \(x^2-5x+6\)?
#negative middle
#factorisation
#quadratic
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A ((x+2)(x+3))
B ((x-1)(x-6))
C ((x-2)(x-3))
D ((x+1)(x+6))
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Correct Answer
C. ((x-2)(x-3))
Explanation
Simple Explanation
(-2+(-3)=-5) और ((-2)(-3)=6) है। परीक्षा में धन स्थिर पद के लिए समान चिह्न देखें। / (-2+(-3)=-5) and ((-2)(-3)=6). Exam tip: for a positive constant term, check same signs.
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\(x^2+x-12\) का सही गुणनखंडन कौन सा है?
Which is the correct factorisation of \(x^2+x-12\)?
#quadratic factorisation
#negative constant
#signs
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A ((x-6)(x+2))
B ((x-4)(x+3))
C ((x+6)(x-2))
D ((x+4)(x-3))
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Correct Answer
D. ((x+4)(x-3))
Explanation
Simple Explanation
(4+(-3)=1) और (4\cdot(-3)=-12) है। परीक्षा में विपरीत चिह्न वाले कारक जांचें। / (4+(-3)=1) and (4\cdot(-3)=-12). Exam tip: check factors with opposite signs.
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\(2x^2+7x+3\) में मध्य पद तोड़ने के लिए कौन सा विभाजन सही है?
Which split of the middle term is correct for \(2x^2+7x+3\)?
#split middle term
#quadratic
#factorisation
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A \(2x^2+7x+6+3\)
B \(2x^2+5x+2x+3\)
C \(2x^2+4x+3x+3\)
D \(2x^2+6x+x+3\)
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Correct Answer
D. \(2x^2+6x+x+3\)
Explanation
Simple Explanation
(6x+x=7x) और \(6\cdot1=6\), जो \(2\cdot3\) के बराबर है। परीक्षा में गुणन (ac) से मिलाएं। / (6x+x=7x) and \(6\cdot1=6\), equal to \(2\cdot3\). Exam tip: match the product with (ac).
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\(2x^2+7x+3\) का गुणनखंडन क्या है?
What is the factorisation of \(2x^2+7x+3\)?
#quadratic factorisation
#coefficient
#medium
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A ((x+1)(x+3))
B ((2x+3)(x+1))
C ((2x+7)(x+3))
D ((2x+1)(x+3))
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Correct Answer
D. ((2x+1)(x+3))
Explanation
Simple Explanation
((2x+1)(x+3)=2x-2 +6x+x+3) है। इसलिए मध्य पद (7x) बनता है। / ((2x+1)(x+3)=2x-2 +6x+x+3). Thus the middle term is (7x).
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\(3x^2+10x+8\) का सही गुणनखंडन चुनिए।
Choose the correct factorisation of \(3x^2+10x+8\).
#quadratic factors
#product checking
#medium
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A ((3x+2)(x+4))
B ((3x+4)(x+2))
C ((x+4)(x+6))
D ((3x+8)(x+1))
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Correct Answer
B. ((3x+4)(x+2))
Explanation
Simple Explanation
((3x+4)(x+2)=3x-2 +6x+4x+8) है। मध्य पद (10x) सही है। / ((3x+4)(x+2)=3x-2 +6x+4x+8). The middle term (10x) is correct.
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\(4x^2-9\) किस प्रकार का द्विघात व्यंजक है?
What type of quadratic expression is \(4x^2-9\)?
#difference of squares
#quadratic expression
#classification
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A पूर्ण वर्ग त्रिपद / Perfect square trinomial
B वर्गों का अंतर / Difference of squares
C रेखीय व्यंजक / Linear expression
D घन व्यंजक / Cubic expression
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Correct Answer
B. वर्गों का अंतर / Difference of squares
Explanation
Simple Explanation
(4x-2 =(2x)2 ) और \(9=3^2\) है। इसलिए यह वर्गों का अंतर है। / (4x-2 =(2x)2 ) and \(9=3^2\). So it is a difference of squares.
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\(9x^2-24x+16\) का गुणनखंड रूप क्या है?
What is the factor form of \(9x^2-24x+16\)?
#perfect square trinomial
#quadratic factor
#coefficient
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A ((3x+4)2 )
B ((9x-4)2 )
C ((3x-4)2 )
D ((3x-8)2 )
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Correct Answer
C. ((3x-4)2 )
Explanation
Simple Explanation
(9x-2 =(3x)2 ), \(16=4^2\), और मध्य पद (-24x) है। इसलिए ((3x-4)2 ) सही है। / (9x-2 =(3x)2 ), \(16=4^2\), and the middle term is (-24x). So ((3x-4)2 ) is correct.
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\(x^2+2xy+y^2\) में चर कौन से हैं?
Which variables are present in \(x^2+2xy+y^2\)?
#variables
#quadratic expression
#two variables
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A केवल (y) / Only (y)
B केवल (x) / Only (x)
C (2) और (1) / (2) and (1)
D (x) और (y) / (x) and (y)
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Correct Answer
D. (x) और (y) / (x) and (y)
Explanation
Simple Explanation
व्यंजक में (x) और (y) दोनों मौजूद हैं। परीक्षा में चर और गुणांक अलग पहचानें। / Both (x) and (y) are present in the expression. Exam tip: distinguish variables and coefficients.
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\(a^2+2ab+b^2\) का गुणनखंड रूप क्या है?
What is the factor form of \(a^2+2ab+b^2\)?
#perfect square
#two variables
#identity
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A ((a-b)2 )
B ((a+b)2 )
C ((a+b)(a-b))
D (a(a+2b))
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Correct Answer
B. ((a+b)2 )
Explanation
Simple Explanation
यह जोड़ वाला पूर्ण वर्ग त्रिपद है। इसलिए (a-2 +2ab+b-2 =(a+b)2 ) है। / It is an addition perfect square trinomial. Therefore (a-2 +2ab+b-2 =(a+b)2 ).
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\(a^2-2ab+b^2\) किसके बराबर है?
What is \(a^2-2ab+b^2\) equal to?
#minus square
#quadratic identity
#factor form
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A ((a+b)2 )
B ((a-b)2 )
C \(a^2-b^2\)
D (2ab)
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Correct Answer
B. ((a-b)2 )
Explanation
Simple Explanation
मध्य पद ऋण है इसलिए यह घटाव वाला पूर्ण वर्ग है। सही रूप ((a-b)2 ) है। / The middle term is negative, so it is a subtraction perfect square. The correct form is ((a-b)2 ).
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\(x^2-25\) का गुणनखंड रूप कौन सा है?
Which is the factor form of \(x^2-25\)?
#difference of squares
#factorisation
#quadratic
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A ((x-5)2 )
B ((x+5)2 )
C ((x-5)(x+5))
D ((x-25)(x+25))
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Correct Answer
C. ((x-5)(x+5))
Explanation
Simple Explanation
\(25=5^2\) है और यह वर्गों का अंतर है। इसलिए ((x-5)(x+5)) मिलेगा। / \(25=5^2\) and this is a difference of squares. So ((x-5)(x+5)) is obtained.
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\(2x^2-5x+3\) का सही गुणनखंडन क्या है?
What is the correct factorisation of \(2x^2-5x+3\)?
#quadratic factorisation
#signs
#coefficient
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A ((x-3)(x-2))
B ((2x+3)(x+1))
C ((2x-3)(x-1))
D ((2x-1)(x-3))
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Correct Answer
C. ((2x-3)(x-1))
Explanation
Simple Explanation
((2x-3)(x-1)=2x-2 -2x-3x+3) है। मध्य पद (-5x) बनता है। / ((2x-3)(x-1)=2x-2 -2x-3x+3). The middle term becomes (-5x).
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\(3x^2-x-2\) का गुणनखंडन चुनिए।
Choose the factorisation of \(3x^2-x-2\).
#quadratic factorisation
#negative constant
#checking
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A ((3x-1)(x+2))
B ((3x-2)(x+1))
C ((x-2)(3x+1))
D ((3x+2)(x-1))
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Correct Answer
D. ((3x+2)(x-1))
Explanation
Simple Explanation
((3x+2)(x-1)=3x-2 -3x+2x-2) है। इससे \(3x^2-x-2\) मिलता है। / ((3x+2)(x-1)=3x-2 -3x+2x-2). This gives \(3x^2-x-2\).
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\(x^2+6x+5\) का गुणनखंडन कौन सा है?
Which is the factorisation of \(x^2+6x+5\)?
#quadratic factorisation
#sum product
#medium
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A ((x+3)(x+3))
B ((x+2)(x+4))
C ((x-1)(x-5))
D ((x+1)(x+5))
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Correct Answer
D. ((x+1)(x+5))
Explanation
Simple Explanation
(1+5=6) और \(1\cdot5=5\) है। परीक्षा में अंतिम पद के कारक जोड़कर देखें। / (1+5=6) and \(1\cdot5=5\). Exam tip: add the factors of the last term.
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\(x^2-7x+10\) का सही गुणनखंड रूप क्या है?
What is the correct factor form of \(x^2-7x+10\)?
#quadratic factorisation
#negative sum
#signs
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A ((x+5)(x+2))
B ((x-5)(x-2))
C ((x-10)(x-1))
D ((x+10)(x+1))
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Correct Answer
B. ((x-5)(x-2))
Explanation
Simple Explanation
(-5+(-2)=-7) और ((-5)(-2)=10) है। इसलिए दोनों गुणनखंड ऋण होंगे। / (-5+(-2)=-7) and ((-5)(-2)=10). Therefore both factors are negative.
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\(x^2-4x-12\) के लिए सही कारक कौन से हैं?
Which are the correct factors for \(x^2-4x-12\)?
#negative constant
#factorisation
#quadratic
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A ((x+4)(x-3))
B ((x+6)(x-2))
C ((x-4)(x+3))
D ((x-6)(x+2))
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Correct Answer
D. ((x-6)(x+2))
Explanation
Simple Explanation
(-6+2=-4) और \(-6\cdot2=-12\) है। परीक्षा में विपरीत चिह्न वाले कारकों का योग मिलाएं। / (-6+2=-4) and \(-6\cdot2=-12\). Exam tip: match the sum of opposite-sign factors.
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\(5x^2+13x+6\) का गुणनखंडन क्या होगा?
What will be the factorisation of \(5x^2+13x+6\)?
#quadratic factorisation
#coefficient
#cross terms
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A ((5x+2)(x+3))
B ((5x+6)(x+1))
C ((x+2)(x+3))
D ((5x+3)(x+2))
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Correct Answer
D. ((5x+3)(x+2))
Explanation
Simple Explanation
((5x+3)(x+2)=5x-2 +10x+3x+6) है। मध्य पद (13x) मिलता है। / ((5x+3)(x+2)=5x-2 +10x+3x+6). The middle term (13x) is obtained.
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\(6x^2+11x+3\) का सही गुणनखंडन चुनिए।
Choose the correct factorisation of \(6x^2+11x+3\).
#quadratic factorisation
#medium
#cross multiplication
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? Hint Small clue
A ((6x+3)(x+1))
B ((3x+1)(2x+3))
C ((6x+1)(x+3))
D ((2x+1)(3x+3))
Explanation opens after your attempt
Correct Answer
B. ((3x+1)(2x+3))
Explanation
Simple Explanation
((3x+1)(2x+3)=6x-2 +9x+2x+3) है। इसलिए मध्य पद (11x) बनता है। / ((3x+1)(2x+3)=6x-2 +9x+2x+3). Thus the middle term is (11x).
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\(x^2+4x-21\) का गुणनखंडन क्या है?
What is the factorisation of \(x^2+4x-21\)?
#quadratic factorisation
#negative constant
#sum product
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? Hint Small clue
A ((x-4)(x+21))
B ((x-7)(x+3))
C ((x+4)(x-21))
D ((x+7)(x-3))
Explanation opens after your attempt
Correct Answer
D. ((x+7)(x-3))
Explanation
Simple Explanation
(7+(-3)=4) और (7\cdot(-3)=-21) है। परीक्षा में बड़ा कारक सही चिह्न के साथ लें। / (7+(-3)=4) and (7\cdot(-3)=-21). Exam tip: choose the larger factor with the correct sign.
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\(x^2-2x-15\) का सही गुणनखंड रूप कौन सा है?
Which is the correct factor form of \(x^2-2x-15\)?
#quadratic factorisation
#sign selection
#medium
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+10 Time+ 10 sec extra
? Hint Small clue
A ((x+15)(x-1))
B ((x+5)(x-3))
C ((x-15)(x+1))
D ((x-5)(x+3))
Explanation opens after your attempt
Correct Answer
D. ((x-5)(x+3))
Explanation
Simple Explanation
(-5+3=-2) और \(-5\cdot3=-15\) है। इसलिए ((x-5)(x+3)) सही है। / (-5+3=-2) and \(-5\cdot3=-15\). So ((x-5)(x+3)) is correct.
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\(4x^2+4x+1\) किसका वर्ग है?
\(4x^2+4x+1\) is the square of what?
#perfect square
#coefficient
#quadratic expression
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? Hint Small clue
A (2) और (1) / (2) and (1)
B (4x+1)
C (2x+1)
D (x+1)
Explanation opens after your attempt
Explanation
Simple Explanation
(4x-2 =(2x)2 ) और \(1=1^2\) है। मध्य पद \(2\cdot2x\cdot1=4x\) है। / (4x-2 =(2x)2 ) and \(1=1^2\). The middle term is \(2\cdot2x\cdot1=4x\).
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\(4x^2+4x+1\) का गुणनखंड रूप क्या है?
What is the factor form of \(4x^2+4x+1\)?
#factor form
#perfect square
#quadratic
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+10 Time+ 10 sec extra
? Hint Small clue
A ((4x+1)2 )
B ((2x+1)2 )
C ((2x-1)2 )
D ((x+2)2 )
Explanation opens after your attempt
Correct Answer
B. ((2x+1)2 )
Explanation
Simple Explanation
यह (2x+1) का पूर्ण वर्ग है। इसलिए गुणनखंड रूप ((2x+1)2 ) है। / It is the perfect square of (2x+1). Therefore the factor form is ((2x+1)2 ).
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\(25x^2-1\) का गुणनखंडन कौन सा है?
Which is the factorisation of \(25x^2-1\)?
#difference of squares
#quadratic factorisation
#coefficient
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? Hint Small clue
A ((5x-1)2 )
B ((25x-1)(x+1))
C ((5x-1)(5x+1))
D ((5x+1)2 )
Explanation opens after your attempt
Correct Answer
C. ((5x-1)(5x+1))
Explanation
Simple Explanation
(25x-2 =(5x)2 ) और \(1=1^2\) है। वर्गों के अंतर से दो गुणनखंड मिलते हैं। / (25x-2 =(5x)2 ) and \(1=1^2\). Difference of squares gives two factors.
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\(16x^2-24x+9\) का गुणनखंड रूप क्या है?
What is the factor form of \(16x^2-24x+9\)?
#perfect square trinomial
#negative middle
#quadratic
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? Hint Small clue
A ((4x+3)2 )
B ((4x-9)2 )
C ((16x-9)2 )
D ((4x-3)2 )
Explanation opens after your attempt
Correct Answer
D. ((4x-3)2 )
Explanation
Simple Explanation
(16x-2 =(4x)2 ), \(9=3^2\), और मध्य पद (-24x) है। इसलिए ((4x-3)2 ) सही है। / (16x-2 =(4x)2 ), \(9=3^2\), and the middle term is (-24x). So ((4x-3)2 ) is correct.
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\(x^2+10x+24\) के गुणनखंड कौन से हैं?
What are the factors of \(x^2+10x+24\)?
#quadratic factors
#sum product
#medium
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+10 Time+ 10 sec extra
? Hint Small clue
A ((x+3)(x+8))
B ((x+2)(x+12))
C ((x+1)(x+24))
D ((x+4)(x+6))
Explanation opens after your attempt
Correct Answer
D. ((x+4)(x+6))
Explanation
Simple Explanation
(4+6=10) और \(4\cdot6=24\) है। परीक्षा में अंतिम पद के कारकों का योग देखें। / (4+6=10) and \(4\cdot6=24\). Exam tip: check the sum of factors of the last term.
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\(x^2-9x+20\) का सही गुणनखंडन क्या होगा?
What will be the correct factorisation of \(x^2-9x+20\)?
#quadratic factorisation
#negative middle
#signs
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+10 Time+ 10 sec extra
? Hint Small clue
A ((x+2)(x+10))
B ((x+4)(x+5))
C ((x-2)(x-10))
D ((x-4)(x-5))
Explanation opens after your attempt
Correct Answer
D. ((x-4)(x-5))
Explanation
Simple Explanation
(-4+(-5)=-9) और ((-4)(-5)=20) है। इसलिए दोनों कारक ऋण हैं। / (-4+(-5)=-9) and ((-4)(-5)=20). Therefore both factors are negative.
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\(x^2+3x-18\) का गुणनखंड रूप कौन सा है?
Which is the factor form of \(x^2+3x-18\)?
#quadratic factorisation
#negative constant
#medium
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+10 Time+ 10 sec extra
? Hint Small clue
A ((x-9)(x+2))
B ((x-6)(x+3))
C ((x+9)(x-2))
D ((x+6)(x-3))
Explanation opens after your attempt
Correct Answer
D. ((x+6)(x-3))
Explanation
Simple Explanation
(6+(-3)=3) और (6\cdot(-3)=-18) है। परीक्षा में विपरीत चिह्नों का योग मिलाएं। / (6+(-3)=3) and (6\cdot(-3)=-18). Exam tip: match the sum of opposite signs.
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\(3x^2+5x+2\) का गुणनखंडन चुनिए।
Choose the factorisation of \(3x^2+5x+2\).
#quadratic factorisation
#coefficient
#cross terms
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+10 Time+ 10 sec extra
? Hint Small clue
A ((3x+2)(x+1))
B ((3x+1)(x+2))
C ((x+2)(x+3))
D ((3x+5)(x+2))
Explanation opens after your attempt
Correct Answer
A. ((3x+2)(x+1))
Explanation
Simple Explanation
((3x+2)(x+1)=3x-2 +3x+2x+2) है। मध्य पद (5x) मिलता है। / ((3x+2)(x+1)=3x-2 +3x+2x+2). The middle term (5x) is obtained.
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\(2x^2+5x-3\) का सही गुणनखंडन कौन सा है?
Which is the correct factorisation of \(2x^2+5x-3\)?
#quadratic factorisation
#negative constant
#checking
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? Hint Small clue
A ((2x-1)(x+3))
B ((2x+1)(x-3))
C ((2x+3)(x-1))
D ((x+3)(x-1))
Explanation opens after your attempt
Correct Answer
A. ((2x-1)(x+3))
Explanation
Simple Explanation
((2x-1)(x+3)=2x-2 +6x-x-3) है। इससे \(2x^2+5x-3\) मिलता है। / ((2x-1)(x+3)=2x-2 +6x-x-3). This gives \(2x^2+5x-3\).
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\(x^2+bx+c\) में (b) किस पद से जुड़ा होता है?
In \(x^2+bx+c\), with which term is (b) associated?
#standard form
#linear term
#quadratic expression
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A द्विघात पद / Quadratic term
B रेखीय पद / Linear term
C स्थिर पद / Constant term
D घन पद / Cubic term
Explanation opens after your attempt
Correct Answer
B. रेखीय पद / Linear term
Explanation
Simple Explanation
(bx) रेखीय पद है क्योंकि इसमें (x) की घात (1) है। परीक्षा में पद की घात से उसका प्रकार पहचानें। / (bx) is the linear term because the power of (x) is (1). Exam tip: identify the term type from its power.
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\(ax^2+bx+c\) में \(a\neq0\) क्यों जरूरी है?
Why is \(a\neq0\) necessary in \(ax^2+bx+c\)?
#standard form
#quadratic coefficient
#definition
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A ताकि घात (3) हो जाए / So that the power becomes (3)
B ताकि स्थिर पद शून्य हो जाए / So that the constant term becomes zero
C ताकि (x) हट जाए / So that (x) disappears
D ताकि व्यंजक द्विघात रहे / So that the expression remains quadratic
Explanation opens after your attempt
Correct Answer
D. ताकि व्यंजक द्विघात रहे / So that the expression remains quadratic
Explanation
Simple Explanation
यदि (a=0) हो तो \(x^2\) पद नहीं रहेगा। तब व्यंजक द्विघात नहीं रहेगा। / If (a=0), the \(x^2\) term will not remain. Then the expression will not be quadratic.
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\(7-3x+2x^2\) को मानक रूप में कैसे लिखेंगे?
How will \(7-3x+2x^2\) be written in standard form?
#standard form
#quadratic expression
#ordering terms
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? Hint Small clue
A \(2x-3x^2+7\)
B \(7+2x^2-3x\)
C \(-3x+7+2x^2\)
D \(2x^2-3x+7\)
Explanation opens after your attempt
Correct Answer
D. \(2x^2-3x+7\)
Explanation
Simple Explanation
मानक रूप में घातों को घटते क्रम में लिखते हैं। इसलिए \(2x^2-3x+7\) सही है। / In standard form, powers are written in decreasing order. So \(2x^2-3x+7\) is correct.
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\(3x^2+2x-1\) में (x=1) रखने पर मान क्या होगा?
What is the value of \(3x^2+2x-1\) when (x=1)?
#evaluation
#substitution
#quadratic expression
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A (2)
B (3)
C (4)
D (5)
Explanation opens after your attempt
Explanation
Simple Explanation
(3(1)2 +2(1)-1=4) है। परीक्षा में ऋण स्थिर पद को अंत में जोड़ें। / (3(1)2 +2(1)-1=4). Exam tip: handle the negative constant term at the end.
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\(x^2-4x+7\) में (x=3) रखने पर मान क्या होगा?
What is the value of \(x^2-4x+7\) when (x=3)?
#value of expression
#quadratic
#evaluation
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A (2)
B (4)
C (6)
D (8)
Explanation opens after your attempt
Explanation
Simple Explanation
\(3^2-4\cdot3+7=9-12+7=4\) है। परीक्षा में संकेतों पर ध्यान दें। / \(3^2-4\cdot3+7=9-12+7=4\). Exam tip: pay attention to signs.
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((2x+3)(x-2)) का विस्तार कौन सा है?
Which is the expansion of ((2x+3)(x-2))?
#expansion
#quadratic product
#algebra
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A \(2x^2+6x-2\)
B \(2x^2+7x-6\)
C \(2x^2-x+6\)
D \(2x^2-x-6\)
Explanation opens after your attempt
Correct Answer
D. \(2x^2-x-6\)
Explanation
Simple Explanation
गुणा करने पर \(2x^2-4x+3x-6=2x^2-x-6\) मिलता है। परीक्षा में समान पद जोड़ें। / Multiplying gives \(2x^2-4x+3x-6=2x^2-x-6\). Exam tip: combine like terms.
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((3x-1)(x+4)) का विस्तार क्या है?
What is the expansion of ((3x-1)(x+4))?
#binomial product
#expansion
#quadratic
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A \(3x^2+x-4\)
B \(3x^2+12x-1\)
C \(3x^2-13x-4\)
D \(3x^2+11x-4\)
Explanation opens after your attempt
Correct Answer
D. \(3x^2+11x-4\)
Explanation
Simple Explanation
((3x-1)(x+4)=3x-2 +12x-x-4) है। इसलिए \(3x^2+11x-4\) मिलेगा। / ((3x-1)(x+4)=3x-2 +12x-x-4). So \(3x^2+11x-4\) is obtained.
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\(x^2+2x+1\) और \(x^2-1\) में कौन सा व्यंजक पूर्ण वर्ग है?
Which expression is a perfect square between \(x^2+2x+1\) and \(x^2-1\)?
#perfect square
#classification
#quadratic
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A कोई नहीं / None
B \(x^2-1\)
C दोनों / Both
D \(x^2+2x+1\)
Explanation opens after your attempt
Correct Answer
D. \(x^2+2x+1\)
Explanation
Simple Explanation
(x-2 +2x+1=(x+1)2 ) है। जबकि \(x^2-1\) वर्गों का अंतर है। / (x-2 +2x+1=(x+1)2 ). But \(x^2-1\) is a difference of squares.
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\(x^2+px+16\) पूर्ण वर्ग हो और (p) धनात्मक हो तो (p) का मान क्या होगा?
If \(x^2+px+16\) is a perfect square and (p) is positive, what is the value of (p)?
#unknown coefficient
#perfect square
#quadratic
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A (4)
B (8)
C (16)
D (32)
Explanation opens after your attempt
Explanation
Simple Explanation
\(16=4^2\) है इसलिए मध्य पद \(2\cdot4x=8x\) होगा। अतः (p=8) है। / \(16=4^2\), so the middle term is \(2\cdot4x=8x\). Hence (p=8).
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\(x^2-10x+k\) पूर्ण वर्ग हो तो (k) का मान क्या होगा?
If \(x^2-10x+k\) is a perfect square, what is the value of (k)?
#completing square
#unknown constant
#quadratic expression
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A (10)
B (20)
C (25)
D (100)
Explanation opens after your attempt
Explanation
Simple Explanation
(-10x) में आधा गुणांक (-5) है और उसका वर्ग (25) है। परीक्षा में आधे गुणांक का वर्ग लें। / Half the coefficient in (-10x) is (-5), and its square is (25). Exam tip: square half of the coefficient.
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यदि \(9x^2+mx+25\) पूर्ण वर्ग हो और मध्य पद धनात्मक हो, तो (m) का मान क्या होगा?
If \(9x^2+mx+25\) is a perfect square and the middle term is positive, what is the value of (m)?
#unknown coefficient
#perfect square
#quadratic expression
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A (15)
B (30)
C (45)
D (75)
Explanation opens after your attempt
Explanation
Simple Explanation
(9x-2 =(3x)2 ) और \(25=5^2\) है इसलिए मध्य पद \(2\cdot3x\cdot5=30x\) होगा। परीक्षा में दोनों वर्ग पदों की जड़ें लेकर दुगुना गुणन करें। / (9x-2 =(3x)2 ) and \(25=5^2\), so the middle term will be \(2\cdot3x\cdot5=30x\). Exam tip: take the roots of both square terms and multiply twice.
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किसी द्विघात अभिव्यक्ति में चर की सबसे बड़ी घात कितनी होती है?
What is the highest power of the variable in a quadratic expression?
#quadratic expressions
#degree
#algebra
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A (1)
B (2)
C (3)
D (0)
Explanation opens after your attempt
Explanation
Simple Explanation
द्विघात अभिव्यक्ति में चर की सबसे बड़ी घात (2) होती है। परीक्षा में घात देखकर प्रकार पहचानें। / A quadratic expression has highest power (2). Exam tip: identify the type by checking the power.
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\(3x^2+5x-7\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(3x^2+5x-7\)?
#quadratic expressions
#coefficient
#standard form
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? Hint Small clue
A (3)
B (5)
C (-7)
D (1)
Explanation opens after your attempt
Explanation
Simple Explanation
\(x^2\) के साथ गुणा हो रही संख्या (3) है। परीक्षा में पद के ठीक पहले का गुणांक देखें। / The number multiplying \(x^2\) is (3). Exam tip: check the coefficient just before the term.
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\(x^2-9x+14\) में रैखिक पद कौन सा है?
Which is the linear term in \(x^2-9x+14\)?
#quadratic expressions
#linear term
#terms
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A \(x^2\)
B (14)
C (-9x)
D \(9x^2\)
Explanation opens after your attempt
Explanation
Simple Explanation
रैखिक पद में चर की घात (1) होती है। परीक्षा में (x) वाला पद रैखिक पद मानें। / The linear term has power (1). Exam tip: treat the (x)-term as the linear term.
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\(2x^2-3x+8\) में स्थिर पद क्या है?
What is the constant term in \(2x^2-3x+8\)?
#quadratic expressions
#constant term
#standard form
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A \(2x^2\)
B (-3x)
C (2)
D (8)
Explanation opens after your attempt
Explanation
Simple Explanation
जिस पद में कोई चर नहीं है वह स्थिर पद होता है। परीक्षा में बिना (x) वाला पद अलग पहचानें। / The term without a variable is the constant term. Exam tip: identify the term without (x).
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((x+4)2 ) का विस्तार कौन सा है?
Which is the expansion of ((x+4)2 )?
#quadratic expressions
#expansion
#identity
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? Hint Small clue
A \(x^2+8x+16\)
B \(x^2+4x+16\)
C \(x^2+16x+8\)
D \(x^2-8x+16\)
Explanation opens after your attempt
Correct Answer
A. \(x^2+8x+16\)
Explanation
Simple Explanation
((x+4)2 =x-2 +2\cdot x\cdot4+16) होता है। परीक्षा में बीच का पद दोगुना गुणन होता है। / ((x+4)2 =x-2 +2\cdot x\cdot4+16). Exam tip: the middle term is twice the product.
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((x-5)2 ) का सही विस्तार क्या है?
What is the correct expansion of ((x-5)2 )?
#quadratic expressions
#minus square
#expansion
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A \(x^2-5x+25\)
B \(x^2-10x+25\)
C \(x^2+10x+25\)
D \(x^2-25\)
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Correct Answer
B. \(x^2-10x+25\)
Explanation
Simple Explanation
((x-5)2 =x-2 -2\cdot x\cdot5+25) है। परीक्षा में ऋण चिन्ह और (2ab) दोनों ध्यान रखें। / ((x-5)2 =x-2 -2\cdot x\cdot5+25). Exam tip: note both the negative sign and (2ab).
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\(x^2+12x+36\) किस पूर्ण वर्ग के बराबर है?
Which perfect square equals \(x^2+12x+36\)?
#quadratic expressions
#perfect square
#identity
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A ((x+12)2 )
B ((x-6)2 )
C ((x+6)2 )
D ((x+3)2 )
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Correct Answer
C. ((x+6)2 )
Explanation
Simple Explanation
\(36=6^2\) और \(12x=2\cdot6\cdot x\) है। परीक्षा में अंतिम पद की वर्गमूल से पुष्टि करें। / Here \(36=6^2\) and \(12x=2\cdot6\cdot x\). Exam tip: confirm using the square root of the last term.
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\(x^2-14x+49\) किस पूर्ण वर्ग के बराबर है?
Which perfect square equals \(x^2-14x+49\)?
#quadratic expressions
#perfect square
#minus square
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A ((x+7)2 )
B ((x-14)2 )
C ((x+14)2 )
D ((x-7)2 )
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Correct Answer
D. ((x-7)2 )
Explanation
Simple Explanation
\(49=7^2\) और \(-14x=-2\cdot7\cdot x\) है। परीक्षा में ऋणात्मक मध्य पद से ((x-7)2 ) पहचानें। / Here \(49=7^2\) and \(-14x=-2\cdot7\cdot x\). Exam tip: identify ((x-7)2 ) from the negative middle term.
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\(2x^2+7x+3\) में द्विघात पद कौन सा है?
Which is the quadratic term in \(2x^2+7x+3\)?
#quadratic expressions
#quadratic term
#terms
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A \(2x^2\)
B (7x)
C (3)
D (2x)
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Correct Answer
A. \(2x^2\)
Explanation
Simple Explanation
द्विघात पद में चर की घात (2) होती है। परीक्षा में \(x^2\) वाला पद पहले पहचानें। / The quadratic term has variable power (2). Exam tip: identify the \(x^2\)-term first.
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\(5x^2-2x+1\) को मानक रूप \(ax^2+bx+c\) में (b) का मान क्या है?
In the standard form \(ax^2+bx+c\), what is (b) for \(5x^2-2x+1\)?
#quadratic expressions
#standard form
#coefficient
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A (5)
B (1)
C (-2)
D (2)
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Explanation
Simple Explanation
(b) रैखिक पद (x) का गुणांक है। परीक्षा में चिन्ह सहित गुणांक लिखें। / (b) is the coefficient of the linear term (x). Exam tip: write the coefficient with its sign.
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\(4x^2+0x-9\) में रैखिक गुणांक क्या है?
What is the linear coefficient in \(4x^2+0x-9\)?
#quadratic expressions
#zero coefficient
#standard form
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A (4)
B (-9)
C (9)
D (0)
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Explanation
Simple Explanation
रैखिक पद (0x) है इसलिए उसका गुणांक (0) है। परीक्षा में अनुपस्थित (x) पद का गुणांक (0) मानें। / The linear term is (0x), so its coefficient is (0). Exam tip: take the missing (x)-term coefficient as (0).
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\(x^2+7x+10\) में ऐसे दो संख्याएं कौन सी हैं जिनका योग (7) और गुणनफल (10) है?
Which two numbers have sum (7) and product (10) for \(x^2+7x+10\)?
#quadratic expressions
#sum product
#factor pair
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A (2) और (5) / (2) and (5)
B (1) और (10) / (1) and (10)
C (3) और (4) / (3) and (4)
D (7) और (10) / (7) and (10)
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Correct Answer
A. (2) और (5) / (2) and (5)
Explanation
Simple Explanation
(2+5=7) और \(2\cdot5=10\) है। परीक्षा में मध्य पद और स्थिर पद दोनों से जोड़ी जांचें। / (2+5=7) and \(2\cdot5=10\). Exam tip: check the pair using both the middle and constant terms.
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\(x^2-3x-18\) के लिए कौन सी संख्या जोड़ी सही है?
Which number pair is correct for \(x^2-3x-18\)?
#quadratic expressions
#signs
#sum product
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A (3) और (-6) / (3) and (-6)
B (6) और (-3) / (6) and (-3)
C (-6) और (3) / (-6) and (3)
D (9) और (-2) / (9) and (-2)
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Correct Answer
C. (-6) और (3) / (-6) and (3)
Explanation
Simple Explanation
(-6+3=-3) और \(-6\cdot3=-18\) है। परीक्षा में ऋणात्मक गुणनफल के लिए विपरीत चिन्ह चुनें। / (-6+3=-3) and \(-6\cdot3=-18\). Exam tip: choose opposite signs for a negative product.
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(x=2) रखने पर \(x^2+3x+4\) का मान क्या होगा?
What is the value of \(x^2+3x+4\) when (x=2)?
#quadratic expressions
#value
#substitution
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A (10)
B (12)
C (14)
D (16)
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Explanation
Simple Explanation
मान \(2^2+3\cdot2+4=14\) है। परीक्षा में पहले वर्ग फिर गुणन करें। / The value is \(2^2+3\cdot2+4=14\). Exam tip: do square first and then multiplication.
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(x=-1) रखने पर \(2x^2-5x+1\) का मान क्या है?
What is the value of \(2x^2-5x+1\) when (x=-1)?
#quadratic expressions
#substitution
#negative value
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A (8)
B (6)
C (4)
D (2)
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Explanation
Simple Explanation
(2(-1)2 -5(-1)+1=2+5+1=8) है। परीक्षा में ऋणात्मक मान को कोष्ठक में रखें। / (2(-1)2 -5(-1)+1=2+5+1=8). Exam tip: put negative values in brackets.
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\(3x^2-12\) को (3) बाहर निकालकर कैसे लिखा जाएगा?
How is \(3x^2-12\) written by taking (3) outside?
#quadratic expressions
#common factor
#simplification
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A (3\(x^2-12\))
B (3\(x^2-4\))
C (3(x-4))
D (3x(x-4))
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Correct Answer
B. (3\(x^2-4\))
Explanation
Simple Explanation
दोनों पदों में (3) सामान्य है और \(12\div3=4\) है। परीक्षा में बाहर निकाले गुणनखंड से अंदर के पद जांचें। / The common factor is (3), and \(12\div3=4\). Exam tip: check inner terms after taking out the factor.
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\(x^2-25\) किस पहचान का उदाहरण है?
Which identity is exemplified by \(x^2-25\)?
#quadratic expressions
#difference of squares
#identity
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A पूर्ण वर्ग त्रिपद / Perfect square trinomial
B दो वर्गों का अंतर / Difference of two squares
C दो घनों का योग / Sum of two cubes
D रैखिक अभिव्यक्ति / Linear expression
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Correct Answer
B. दो वर्गों का अंतर / Difference of two squares
Explanation
Simple Explanation
\(25=5^2\), इसलिए \(x^2-25\) दो वर्गों का अंतर है। परीक्षा में वर्ग संख्या पहचानें। / Since \(25=5^2\), \(x^2-25\) is a difference of two squares. Exam tip: identify square numbers.
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\(2x^2+5x\) में सामान्य गुणनखंड क्या है?
What is the common factor in \(2x^2+5x\)?
#quadratic expressions
#common factor
#terms
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A (x)
B (2x)
C (5x)
D (10x)
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Explanation
Simple Explanation
दोनों पदों में केवल (x) सामान्य है। परीक्षा में संख्या और चर दोनों का सामान्य भाग अलग देखें। / Only (x) is common in both terms. Exam tip: check common numerical and variable parts separately.
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\(x^2+6x+k\) को पूर्ण वर्ग बनाने के लिए (k) का मान क्या होना चाहिए?
What should be the value of (k) to make \(x^2+6x+k\) a perfect square?
#quadratic expressions
#completing square
#perfect square
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A (6)
B (9)
C (12)
D (36)
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Explanation
Simple Explanation
(6x) का आधा (3x) है इसलिए स्थिर पद \(3^2=9\) चाहिए। परीक्षा में (x) के गुणांक का आधा करके वर्ग करें। / Half of (6) is (3), so the constant term should be \(3^2=9\). Exam tip: square half the coefficient of (x).
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\(x^2-8x+k\) को पूर्ण वर्ग बनाने के लिए (k) क्या होगा?
What is (k) to make \(x^2-8x+k\) a perfect square?
#quadratic expressions
#completing square
#minus term
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A (4)
B (8)
C (16)
D (64)
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Explanation
Simple Explanation
(-8) का आधा (-4) है और ((-4)2 =16) है। परीक्षा में आधे गुणांक का वर्ग हमेशा धनात्मक होता है। / Half of (-8) is (-4), and ((-4)2 =16). Exam tip: the square of half the coefficient is positive.
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\(x^2+10x+21\) में मध्य पद को किन दो पदों में तोड़ा जा सकता है?
Into which two terms can the middle term of \(x^2+10x+21\) be split?
#quadratic expressions
#middle term
#splitting
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A (3x) और (7x) / (3x) and (7x)
B (4x) और (6x) / (4x) and (6x)
C (5x) और (5x) / (5x) and (5x)
D (2x) और (8x) / (2x) and (8x)
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Correct Answer
A. (3x) और (7x) / (3x) and (7x)
Explanation
Simple Explanation
(3+7=10) और \(3\cdot7=21\) है। परीक्षा में स्थिर पद के गुणनखंडों का योग देखें। / (3+7=10) and \(3\cdot7=21\). Exam tip: check the sum of factors of the constant term.
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\(x^2-x-20\) में मध्य पद के लिए सही विभाजन कौन सा है?
Which is the correct split for the middle term in \(x^2-x-20\)?
#quadratic expressions
#middle term
#signs
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A (4x-5x)
B (5x-4x)
C (-4x+5x)
D (-2x+x)
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Correct Answer
A. (4x-5x)
Explanation
Simple Explanation
(4+(-5)=-1) और (4\cdot(-5)=-20) है। परीक्षा में चिन्हों के कारण योग बदलता है। / (4+(-5)=-1) and (4\cdot(-5)=-20). Exam tip: signs change the sum.
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\(2x^2+3x+1\) को फैलाने वाले गुणनखंड कौन से हो सकते हैं?
Which factors can expand to \(2x^2+3x+1\)?
#quadratic expressions
#expansion
#factors
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A ((2x+1)(x+1))
B ((2x+3)(x+1))
C ((x+1)(x+1))
D ((2x-1)(x-1))
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Correct Answer
A. ((2x+1)(x+1))
Explanation
Simple Explanation
((2x+1)(x+1)=2x-2 +2x+x+1) है। परीक्षा में फैलाकर मध्य पद मिलाएं। / ((2x+1)(x+1)=2x-2 +2x+x+1). Exam tip: expand and match the middle term.
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\(3x^2+8x+4\) के लिए सही गुणनखंड कौन से हैं?
Which are the correct factors for \(3x^2+8x+4\)?
#quadratic expressions
#factorisation
#checking
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A ((3x+4)(x+1))
B ((3x+2)(x+2))
C ((x+4)(3x+1))
D ((3x-2)(x-2))
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Correct Answer
B. ((3x+2)(x+2))
Explanation
Simple Explanation
((3x+2)(x+2)) से \(3x^2+6x+2x+4\) मिलता है। परीक्षा में (8x) बनने की जांच करें। / ((3x+2)(x+2)) gives \(3x^2+6x+2x+4\). Exam tip: check that (8x) is formed.
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\(7x^2\) किस प्रकार का पद है?
What type of term is \(7x^2\)?
#quadratic expressions
#quadratic term
#degree
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A रैखिक पद / Linear term
B स्थिर पद / Constant term
C द्विघात पद / Quadratic term
D घन पद / Cubic term
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Correct Answer
C. द्विघात पद / Quadratic term
Explanation
Simple Explanation
\(7x^2\) में चर की घात (2) है। परीक्षा में घात (2) वाले पद को द्विघात पद कहें। / In \(7x^2\), the power of the variable is (2). Exam tip: call a term with power (2) a quadratic term.
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\(4x^2-12x+9\) का पूर्ण वर्ग रूप क्या है?
What is the perfect square form of \(4x^2-12x+9\)?
#quadratic expressions
#perfect square
#coefficient
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A ((2x+3)2 )
B ((4x-3)2 )
C ((2x-3)2 )
D ((x-3)2 )
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Correct Answer
C. ((2x-3)2 )
Explanation
Simple Explanation
(4x-2 =(2x)2 ), \(9=3^2\) और बीच का पद (-12x) है। परीक्षा में गुणांक सहित वर्गमूल लें। / (4x-2 =(2x)2 ), \(9=3^2\), and the middle term is (-12x). Exam tip: take square roots with coefficients.
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\(9x^2+24x+16\) किसके बराबर है?
What is \(9x^2+24x+16\) equal to?
#quadratic expressions
#perfect square
#identity
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A ((3x+4)2 )
B ((9x+4)2 )
C ((3x-4)2 )
D ((x+4)2 )
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Correct Answer
A. ((3x+4)2 )
Explanation
Simple Explanation
(9x-2 =(3x)2 ), \(16=4^2\) और \(24x=2\cdot3x\cdot4\) है। परीक्षा में पूर्ण वर्ग के तीन संकेत देखें। / (9x-2 =(3x)2 ), \(16=4^2\), and \(24x=2\cdot3x\cdot4\). Exam tip: look for all three perfect square clues.
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\(x^2+2xy+y^2\) को किस द्विघात रूप में देखा जा सकता है?
In which quadratic form can \(x^2+2xy+y^2\) be seen?
#quadratic expressions
#two variables
#perfect square
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A ((x+y)2 )
B ((x-y)2 )
C ((x+y)(x-y))
D \(x^2-y^2\)
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Correct Answer
A. ((x+y)2 )
Explanation
Simple Explanation
यह दो चरों वाला पूर्ण वर्ग त्रिपद है। परीक्षा में (2xy) को बीच का दोगुना गुणन मानें। / This is a perfect square trinomial in two variables. Exam tip: treat (2xy) as the middle double product.
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\(x^2-y^2\) को द्विघात अभिव्यक्ति के रूप में किस पहचान से जोड़ा जाता है?
With which identity is \(x^2-y^2\) linked as a quadratic expression?
#quadratic expressions
#difference of squares
#identity
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A दो वर्गों का अंतर / Difference of two squares
B दो वर्गों का योग / Sum of two squares
C पूर्ण वर्ग योग / Perfect square sum
D घन का अंतर / Difference of cubes
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Correct Answer
A. दो वर्गों का अंतर / Difference of two squares
Explanation
Simple Explanation
\(x^2-y^2\) में दो वर्गों का अंतर है। परीक्षा में इसे ((x-y)(x+y)) से जोड़ें। / \(x^2-y^2\) is a difference of two squares. Exam tip: connect it with ((x-y)(x+y)).
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\(x^2+0x+16\) में स्थिर पद और रैखिक गुणांक क्रमशः क्या हैं?
What are the constant term and linear coefficient respectively in \(x^2+0x+16\)?
#quadratic expressions
#constant term
#linear coefficient
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A (16) और (0) / (16) and (0)
B (0) और (16) / (0) and (16)
C (1) और (16) / (1) and (16)
D (16) और (1) / (16) and (1)
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Correct Answer
A. (16) और (0) / (16) and (0)
Explanation
Simple Explanation
स्थिर पद (16) और (x) का गुणांक (0) है। परीक्षा में क्रम शब्द को ध्यान से पढ़ें। / The constant term is (16), and the coefficient of (x) is (0). Exam tip: read the order word carefully.
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कौन सी अभिव्यक्ति द्विघात नहीं है?
Which expression is not quadratic?
#quadratic expressions
#non quadratic
#degree
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A \(x^2+2x+1\)
B \(3x^2-5\)
C \(x^3+x+1\)
D \(5x^2\)
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Correct Answer
C. \(x^3+x+1\)
Explanation
Simple Explanation
\(x^3+x+1\) में सबसे बड़ी घात (3) है। परीक्षा में द्विघात के लिए सबसे बड़ी घात (2) होनी चाहिए। / The highest power in \(x^3+x+1\) is (3). Exam tip: for a quadratic, the highest power must be (2).
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कौन सी अभिव्यक्ति द्विघात एकपद है?
Which expression is a quadratic monomial?
#quadratic expressions
#monomial
#degree
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A \(7x^2\)
B \(x^2+7\)
C \(x^2+7x+1\)
D (7x+2)
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Correct Answer
A. \(7x^2\)
Explanation
Simple Explanation
\(7x^2\) में केवल एक पद है और घात (2) है। परीक्षा में पदों की संख्या और घात दोनों देखें। / \(7x^2\) has only one term and power (2). Exam tip: check both number of terms and degree.
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कौन सी अभिव्यक्ति द्विघात द्विपद है?
Which expression is a quadratic binomial?
#quadratic expressions
#binomial
#terms
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A \(x^2+3x+2\)
B \(x^2-9\)
C (x+9)
D \(x^3-9\)
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Correct Answer
B. \(x^2-9\)
Explanation
Simple Explanation
\(x^2-9\) में दो पद हैं और सबसे बड़ी घात (2) है। परीक्षा में द्विपद के लिए दो पद गिनें। / \(x^2-9\) has two terms and highest power (2). Exam tip: count two terms for a binomial.
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कौन सी अभिव्यक्ति द्विघात त्रिपद है?
Which expression is a quadratic trinomial?
#quadratic expressions
#trinomial
#classification
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A \(x^2+5\)
B \(x^3+x+1\)
C \(x^2+4x+4\)
D (4x+4)
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Correct Answer
C. \(x^2+4x+4\)
Explanation
Simple Explanation
\(x^2+4x+4\) में तीन पद हैं और घात (2) है। परीक्षा में त्रिपद के लिए तीन पद होने चाहिए। / \(x^2+4x+4\) has three terms and degree (2). Exam tip: a trinomial must have three terms.
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\(2x^2+7x+6\) में (a), (b), (c) के मान क्रमशः क्या हैं?
What are the values of (a), (b), and (c) respectively in \(2x^2+7x+6\)?
#quadratic expressions
#standard form
#abc
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A (2), (7), (6)
B (7), (2), (6)
C (6), (7), (2)
D (2), (6), (7)
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Correct Answer
A. (2), (7), (6)
Explanation
Simple Explanation
मानक रूप \(ax^2+bx+c\) से (a=2), (b=7), (c=6) हैं। परीक्षा में पदों का क्रम न बदलें। / From standard form \(ax^2+bx+c\), (a=2), (b=7), (c=6). Exam tip: do not change the order of terms.
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\(-x^2+4x+5\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(-x^2+4x+5\)?
#quadratic expressions
#coefficient
#negative coefficient
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A (1)
B (-1)
C (4)
D (5)
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Explanation
Simple Explanation
\(-x^2\) का अर्थ \(-1\cdot x^2\) है। परीक्षा में छिपे हुए (1) का चिन्ह याद रखें। / \(-x^2\) means \(-1\cdot x^2\). Exam tip: remember the sign of the hidden (1).
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(x=3) पर \(x^2-4x+7\) का मान क्या है?
What is the value of \(x^2-4x+7\) at (x=3)?
#quadratic expressions
#value
#substitution
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A (2)
B (4)
C (6)
D (8)
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Explanation
Simple Explanation
\(3^2-4\cdot3+7=9-12+7=4\) है। परीक्षा में चिन्हों के साथ चरणबद्ध गणना करें। / \(3^2-4\cdot3+7=9-12+7=4\). Exam tip: calculate stepwise with signs.
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(x=-2) पर \(x^2+2x-3\) का मान क्या है?
What is the value of \(x^2+2x-3\) at (x=-2)?
#quadratic expressions
#negative substitution
#value
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A (-3)
B (3)
C (5)
D (-5)
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Explanation
Simple Explanation
((-2)2 +2(-2)-3=4-4-3=-3) है। परीक्षा में ऋणात्मक संख्या का वर्ग धनात्मक रखें। / ((-2)2 +2(-2)-3=4-4-3=-3). Exam tip: keep the square of a negative number positive.
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\(x^2+bx+16\) पूर्ण वर्ग हो और (b) धनात्मक हो, तो (b) क्या होगा?
If \(x^2+bx+16\) is a perfect square and (b) is positive, what is (b)?
#quadratic expressions
#perfect square
#missing coefficient
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A (4)
B (8)
C (16)
D (32)
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Explanation
Simple Explanation
\(16=4^2\), इसलिए बीच का पद \(2\cdot4\cdot x=8x\) होगा। परीक्षा में \(b=2\sqrt{c}\) यहां उपयोगी है। / Since \(16=4^2\), the middle term is \(2\cdot4\cdot x=8x\). Exam tip: \(b=2\sqrt{c}\) is useful here.
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\(x^2+bx+25\) पूर्ण वर्ग हो और (b) ऋणात्मक हो, तो (b) क्या होगा?
If \(x^2+bx+25\) is a perfect square and (b) is negative, what is (b)?
#quadratic expressions
#missing coefficient
#minus square
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A (10)
B (-10)
C (5)
D (-5)
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Explanation
Simple Explanation
\(25=5^2\), इसलिए ऋणात्मक पूर्ण वर्ग में \(b=-2\cdot5=-10\) है। परीक्षा में संकेत शर्त जरूर पढ़ें। / Since \(25=5^2\), for the negative perfect square \(b=-2\cdot5=-10\). Exam tip: read the sign condition carefully.
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\(2x^2+5x+2\) में मध्य पद को कैसे विभाजित करेंगे?
How will you split the middle term in \(2x^2+5x+2\)?
#quadratic expressions
#middle term
#splitting
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A (2x+3x)
B (x+4x)
C (5x+0x)
D (-2x+7x)
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Explanation
Simple Explanation
\(2\cdot2=4\) और (1+4=5), इसलिए (x+4x) उपयुक्त है। परीक्षा में (ac) और (b) का संबंध देखें। / Here \(2\cdot2=4\), and (1+4=5), so (x+4x) works. Exam tip: check the relation of (ac) and (b).
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\(3x^2+10x+8\) में मध्य पद को किस तरह तोड़ना सही है?
How should the middle term be split in \(3x^2+10x+8\)?
#quadratic expressions
#splitting middle term
#ac method
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A (4x+6x)
B (3x+7x)
C (2x+8x)
D (5x+5x)
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Correct Answer
A. (4x+6x)
Explanation
Simple Explanation
\(3\cdot8=24\) और (4+6=10), \(4\cdot6=24\) है। परीक्षा में (ac) के गुणनखंडों का योग (b) होना चाहिए। / \(3\cdot8=24\), and (4+6=10), \(4\cdot6=24\). Exam tip: factors of (ac) must add to (b).
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\(5x^2+16x+3\) में (ac) विधि के लिए (ac) का मान क्या है?
What is the value of (ac) for the (ac) method in \(5x^2+16x+3\)?
#quadratic expressions
#ac method
#coefficients
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A (5)
B (8)
C (15)
D (16)
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Explanation
Simple Explanation
यहां (a=5) और (c=3), इसलिए (ac=15) है। परीक्षा में पहले (a) और (c) साफ पहचानें। / Here (a=5) and (c=3), so (ac=15). Exam tip: identify (a) and (c) clearly first.
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\(5x^2+16x+3\) के लिए मध्य पद की सही जोड़ी कौन सी है?
Which is the correct middle-term pair for \(5x^2+16x+3\)?
#quadratic expressions
#middle term
#ac method
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A (5x) और (11x) / (5x) and (11x)
B (15x) और (x) / (15x) and (x)
C (10x) और (6x) / (10x) and (6x)
D (3x) और (13x) / (3x) and (13x)
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Correct Answer
B. (15x) और (x) / (15x) and (x)
Explanation
Simple Explanation
(15+1=16) और \(15\cdot1=15\) है। परीक्षा में (ac) के गुणनफल और (b) के योग दोनों जांचें। / (15+1=16) and \(15\cdot1=15\). Exam tip: check both product (ac) and sum (b).
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\(4x^2-1\) का सही गुणनखंड रूप कौन सा है?
Which is the correct factorised form of \(4x^2-1\)?
#quadratic expressions
#difference of squares
#coefficient
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A ((4x-1)(4x+1))
B ((2x-1)(2x+1))
C ((2x-1)2 )
D ((x-1)(x+1))
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Correct Answer
B. ((2x-1)(2x+1))
Explanation
Simple Explanation
(4x-2 =(2x)2 ) और \(1=1^2\) है। परीक्षा में गुणांक सहित वर्गमूल निकालें। / (4x-2 =(2x)2 ) and \(1=1^2\). Exam tip: take square roots with coefficients.
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\(x^2+9\) के बारे में सही कथन कौन सा है?
Which statement is correct about \(x^2+9\)?
#quadratic expressions
#sum of squares
#concept
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A यह वास्तविक रैखिक गुणनखंडों में तुरंत टूटता है / It directly splits into real linear factors
B यह दो वर्गों का योग है / It is a sum of two squares
C यह ((x+3)2 ) है / It is ((x+3)2 )
D यह रैखिक अभिव्यक्ति है / It is a linear expression
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Correct Answer
B. यह दो वर्गों का योग है / It is a sum of two squares
Explanation
Simple Explanation
\(x^2+9\) दो वर्गों का योग है, अंतर नहीं। परीक्षा में \(x^2+9\) को ((x+3)2 ) न लिखें। / \(x^2+9\) is a sum of two squares, not a difference. Exam tip: do not write \(x^2+9\) as ((x+3)2 ).
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\(x^2+6x+9\) और \(x^2+9\) में मुख्य अंतर क्या है?
What is the main difference between \(x^2+6x+9\) and \(x^2+9\)?
#quadratic expressions
#perfect square
#comparison
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A पहली में मध्य पद (6x) है / The first has middle term (6x)
B दूसरी द्विघात नहीं है / The second is not quadratic
C पहली में \(x^2\) नहीं है / The first has no \(x^2\)
D दोनों समान हैं / Both are the same
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Correct Answer
A. पहली में मध्य पद (6x) है / The first has middle term (6x)
Explanation
Simple Explanation
\(x^2+6x+9\) पूर्ण वर्ग है लेकिन \(x^2+9\) में मध्य पद नहीं है। परीक्षा में मध्य पद की उपस्थिति जांचें। / \(x^2+6x+9\) is a perfect square, but \(x^2+9\) lacks the middle term. Exam tip: check whether the middle term is present.
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\(x^2-5x+6\) में मध्य पद को किस प्रकार विभाजित करना सही होगा?
How should the middle term be split in \(x^2-5x+6\)?
#quadratic expressions
#middle term
#splitting
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A (-2x-3x)
B (2x+3x)
C (-1x-6x)
D (x-6x)
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Correct Answer
A. (-2x-3x)
Explanation
Simple Explanation
(-2-3=-5) और ((-2)(-3)=6) है। परीक्षा में धनात्मक स्थिर पद और ऋणात्मक मध्य पद के लिए दोनों संख्याएं ऋणात्मक लें। / Here (-2-3=-5) and ((-2)(-3)=6). Exam tip: for a positive constant and negative middle term, take both numbers negative.
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\(2x^2-7x+3\) का सही गुणनखंड रूप कौन सा है?
Which is the correct factorised form of \(2x^2-7x+3\)?
#quadratic expressions
#factorisation
#checking
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A ((2x-1)(x-3))
B ((2x+1)(x-3))
C ((2x-3)(x-1))
D ((x-1)(x-3))
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Correct Answer
A. ((2x-1)(x-3))
Explanation
Simple Explanation
((2x-1)(x-3)) फैलाने पर \(2x^2-6x-x+3\) मिलता है। परीक्षा में फैलाकर मध्य पद की पुष्टि करें। / Expanding ((2x-1)(x-3)) gives \(2x^2-6x-x+3\). Exam tip: verify the middle term by expansion.
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यदि \(x^2+px+36\) पूर्ण वर्ग हो और (p) धनात्मक हो, तो (p) का मान क्या होगा?
If \(x^2+px+36\) is a perfect square and (p) is positive, what is the value of (p)?
#quadratic expressions
#perfect square
#missing coefficient
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A (6)
B (9)
C (12)
D (18)
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Explanation
Simple Explanation
\(36=6^2\) है इसलिए मध्य पद \(2\cdot6\cdot x=12x\) होगा। परीक्षा में अंतिम पद की वर्गमूल को दोगुना करें। / Since \(36=6^2\), the middle term will be \(2\cdot6\cdot x=12x\). Exam tip: double the square root of the constant term.
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कौन सा व्यंजक (x) में द्विघात व्यंजक है?
Which expression is a quadratic expression in (x)?
#quadratic expression
#degree
#identification
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A (3x+5)
B \(x^2-4x+7\)
C \(x^3+2x\)
D \(\frac{2}{x}+1\)
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Correct Answer
B. \(x^2-4x+7\)
Explanation
Simple Explanation
द्विघात व्यंजक में चर की अधिकतम घात (2) होती है। परीक्षा में सबसे बड़ी घात देखकर पहचान करें। / A quadratic expression has the highest power (2). Exam tip: identify it by checking the highest power.
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\(5x^2-3x+9\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(5x^2-3x+9\)?
#coefficient
#quadratic expression
#x square
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A (-3)
B (9)
C (1)
D (5)
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Explanation
Simple Explanation
\(x^2\) के साथ लगा हुआ संख्या गुणांक (5) है। परीक्षा में पद और उसके गुणांक को अलग पहचानें। / The number attached to \(x^2\) is (5). Exam tip: identify the term and its coefficient separately.
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\(2a^2+7a-4\) का स्थिर पद कौन सा है?
Which is the constant term of \(2a^2+7a-4\)?
#constant term
#quadratic expression
#terms
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A (2)
B (7)
C (a)
D (-4)
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Explanation
Simple Explanation
जिस पद में चर नहीं होता वह स्थिर पद होता है। यहां स्थिर पद (-4) है। / The term without a variable is the constant term. Here the constant term is (-4).
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((x+4)2 ) को विस्तारित करने पर कौन सा व्यंजक मिलेगा?
Which expression is obtained by expanding ((x+4)2 )?
#expansion
#perfect square
#quadratic expression
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A \(x^2+4x+16\)
B \(x^2+16x+8\)
C \(x^2-8x+16\)
D \(x^2+8x+16\)
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Correct Answer
D. \(x^2+8x+16\)
Explanation
Simple Explanation
((x+4)2 =x-2 +2\cdot x\cdot4+16) होता है। परीक्षा में मध्य पद (2ab) न भूलें। / ((x+4)2 =x-2 +2\cdot x\cdot4+16). Exam tip: do not forget the middle term (2ab).
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((y-6)2 ) का सही विस्तारित रूप क्या है?
What is the correct expanded form of ((y-6)2 )?
#perfect square
#expansion
#minus sign
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A \(y^2-6y+36\)
B \(y^2-12y+36\)
C \(y^2+12y+36\)
D \(y^2-36\)
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Correct Answer
B. \(y^2-12y+36\)
Explanation
Simple Explanation
((y-6)2 =y-2 -2\cdot y\cdot6+36) है। परीक्षा में ऋण चिन्ह केवल मध्य पद को प्रभावित करता है। / ((y-6)2 =y-2 -2\cdot y\cdot6+36). Exam tip: the negative sign affects the middle term.
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((x+3)(x+5)) का गुणनफल कौन सा है?
Which is the product of ((x+3)(x+5))?
#binomial product
#quadratic expression
#expansion
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A \(x^2+15x+8\)
B \(x^2-8x+15\)
C \(x^2+8x+15\)
D \(x^2+2x+15\)
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Correct Answer
C. \(x^2+8x+15\)
Explanation
Simple Explanation
मध्य पद (3x+5x=8x) और स्थिर पद (15) है। परीक्षा में दोनों द्विपदों के हर पद को गुणा करें। / The middle term is (3x+5x=8x) and the constant term is (15). Exam tip: multiply every term of both binomials.
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((p-2)(p+7)) का विस्तारित रूप क्या होगा?
What will be the expanded form of ((p-2)(p+7))?
#binomial product
#signs
#quadratic expression
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A \(p^2-5p-14\)
B \(p^2+9p+14\)
C \(p^2-14\)
D \(p^2+5p-14\)
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Correct Answer
D. \(p^2+5p-14\)
Explanation
Simple Explanation
(-2p+7p=5p) और \(-2\cdot7=-14\) होता है। परीक्षा में चिन्हों का ध्यान रखें। / (-2p+7p=5p) and \(-2\cdot7=-14\). Exam tip: be careful with signs.
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\(x^2+10x+25\) किस पूर्ण वर्ग के बराबर है?
Which perfect square is equal to \(x^2+10x+25\)?
#perfect square
#quadratic expression
#identity
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A ((x+10)2 )
B ((x-5)2 )
C ((x+5)2 )
D ((x+25)2 )
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Correct Answer
C. ((x+5)2 )
Explanation
Simple Explanation
यह \(x^2+2\cdot x\cdot5+5^2\) के रूप में है। परीक्षा में मध्य पद को (2ab) से मिलाएं। / It is in the form \(x^2+2\cdot x\cdot5+5^2\). Exam tip: match the middle term with (2ab).
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\(4x^2-12x+9\) किसके बराबर है?
What is \(4x^2-12x+9\) equal to?
#perfect square
#identity
#quadratic expression
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A ((2x+3)2 )
B ((2x-3)2 )
C ((4x-3)2 )
D ((x-6)2 )
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Correct Answer
B. ((2x-3)2 )
Explanation
Simple Explanation
यह ((2x)2 -2\cdot2x\cdot3+32 ) है। परीक्षा में पहले और अंतिम पद के वर्ग पहचानें। / It is ((2x)2 -2\cdot2x\cdot3+32 ). Exam tip: identify the squares of the first and last terms.
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\(x^2-9\) किस प्रकार का द्विघात व्यंजक है?
What type of quadratic expression is \(x^2-9\)?
#difference of squares
#quadratic expression
#identity
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A पूर्ण वर्ग त्रिपद / Perfect square trinomial
B घनों का योग / Sum of cubes
C रेखीय व्यंजक / Linear expression
D दो वर्गों का अंतर / Difference of two squares
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Correct Answer
D. दो वर्गों का अंतर / Difference of two squares
Explanation
Simple Explanation
\(x^2-9=x^2-3^2\) है। परीक्षा में ((a-b)(a+b)) रूप को पहचानें। / \(x^2-9=x^2-3^2\). Exam tip: recognise the form ((a-b)(a+b)).
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\(3x^2+2x-1\) में (x) का गुणांक क्या है?
What is the coefficient of (x) in \(3x^2+2x-1\)?
#coefficient
#linear term
#quadratic expression
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A (3)
B (2)
C (-1)
D (1)
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Explanation
Simple Explanation
(x) वाले पद (2x) का गुणांक (2) है। परीक्षा में \(x^2\) और (x) के गुणांक अलग रखें। / The coefficient of the (x)-term (2x) is (2). Exam tip: keep the coefficients of \(x^2\) and (x) separate.
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मानक रूप \(ax^2+bx+c\) में \(7x^2-5x+11\) के लिए (b) क्या है?
In the standard form \(ax^2+bx+c\), what is (b) for \(7x^2-5x+11\)?
#standard form
#coefficient
#quadratic expression
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A (7)
B (5)
C (-5)
D (11)
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Explanation
Simple Explanation
(b) (x) वाले पद का गुणांक होता है। यहां (x) का गुणांक (-5) है। / (b) is the coefficient of the (x)-term. Here the coefficient of (x) is (-5).
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मानक रूप \(ax^2+bx+c\) में \(2x^2+9x-4\) के लिए (c) क्या है?
In the standard form \(ax^2+bx+c\), what is (c) for \(2x^2+9x-4\)?
#standard form
#constant term
#quadratic expression
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A (2)
B (9)
C (-9)
D (-4)
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Explanation
Simple Explanation
(c) स्थिर पद होता है जिसमें (x) नहीं होता। यहां (c=-4) है। / (c) is the constant term without (x). Here (c=-4).
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(x=-1) होने पर \(2x^2-5x+3\) का मान क्या है?
What is the value of \(2x^2-5x+3\) when (x=-1)?
#substitution
#negative value
#quadratic expression
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A (0)
B (5)
C (10)
D (12)
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Explanation
Simple Explanation
(2(-1)2 -5(-1)+3=2+5+3=10) है। परीक्षा में ऋणात्मक मान को ब्रैकेट में रखें। / (2(-1)2 -5(-1)+3=2+5+3=10). Exam tip: put negative values in brackets.
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\(3x^2-4x+1\) में कुल कितने पद हैं?
How many terms are there in \(3x^2-4x+1\)?
#terms
#trinomial
#quadratic expression
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A (1)
B (2)
C (3)
D (4)
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Explanation
Simple Explanation
पद हैं \(3x^2\), (-4x) और (1)। परीक्षा में चिन्ह सहित पद अलग करें। / The terms are \(3x^2\), (-4x), and (1). Exam tip: separate terms with their signs.
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\(x^2+px+12\) को ((x+3)(x+4)) के बराबर करने के लिए (p) क्या होगा?
What is (p) if \(x^2+px+12\) equals ((x+3)(x+4))?
#coefficient comparison
#quadratic expression
#binomial product
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A (12)
B (3)
C (7)
D (4)
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Explanation
Simple Explanation
((x+3)(x+4)=x-2 +7x+12) होता है। इसलिए (p=7) है। / ((x+3)(x+4)=x-2 +7x+12). Therefore (p=7).
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\(x^2-kx+16\) को ((x-8)(x-2)) के बराबर करने के लिए (k) क्या है?
What is (k) if \(x^2-kx+16\) equals ((x-8)(x-2))?
#coefficient comparison
#quadratic expression
#signs
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A (6)
B (10)
C (-10)
D (16)
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Explanation
Simple Explanation
((x-8)(x-2)=x-2 -10x+16) है। इसलिए (k=10) होगा। / ((x-8)(x-2)=x-2 -10x+16). Therefore (k=10).
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किस (m) के लिए \(x^2+mx+49\) पूर्ण वर्ग त्रिपद बनेगा?
For which (m) will \(x^2+mx+49\) be a perfect square trinomial?
#perfect square
#missing coefficient
#quadratic expression
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A (7)
B (14)
C (21)
D (49)
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Explanation
Simple Explanation
\(49=7^2\) और पूर्ण वर्ग के लिए मध्य पद \(2\cdot7x=14x\) चाहिए। परीक्षा में अंतिम पद का वर्गमूल लें। / \(49=7^2\), and a perfect square needs middle term \(2\cdot7x=14x\). Exam tip: take the square root of the last term.
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\(x^2-mx+36\) को पूर्ण वर्ग बनाने के लिए (m) का धनात्मक मान क्या होगा?
What is the positive value of (m) to make \(x^2-mx+36\) a perfect square?
#perfect square
#missing coefficient
#quadratic expression
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A (6)
B (9)
C (12)
D (18)
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Explanation
Simple Explanation
\(36=6^2\) है और ((x-6)2 =x-2 -12x+36) होता है। इसलिए (m=12) है। / \(36=6^2\) and ((x-6)2 =x-2 -12x+36). So (m=12).
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\(4x^2+mx+25\) पूर्ण वर्ग हो तो (m) का धनात्मक मान क्या है?
If \(4x^2+mx+25\) is a perfect square, what is the positive value of (m)?
#perfect square
#coefficient
#quadratic expression
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A (10)
B (20)
C (25)
D (40)
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Explanation
Simple Explanation
(4x-2 =(2x)2 ) और \(25=5^2\) हैं। मध्य पद \(2\cdot2x\cdot5=20x\) होगा। / (4x-2 =(2x)2 ) and \(25=5^2\). The middle term will be \(2\cdot2x\cdot5=20x\).
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\(x^2+8x\) को पूर्ण वर्ग बनाने के लिए कौन सा पद जोड़ना चाहिए?
Which term should be added to \(x^2+8x\) to make it a perfect square?
#completing square
#quadratic expression
#identity
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A (4)
B (8)
C (64)
D (16)
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Explanation
Simple Explanation
(8) का आधा (4) और \(4^2=16\) है। परीक्षा में आधे गुणांक का वर्ग जोड़ें। / Half of (8) is (4), and \(4^2=16\). Exam tip: add the square of half the coefficient.
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\(x^2-12x\) को पूर्ण वर्ग बनाने के लिए कौन सा पद जोड़ना चाहिए?
Which term should be added to \(x^2-12x\) to make it a perfect square?
#completing square
#perfect square
#quadratic expression
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A (12)
B (24)
C (36)
D (144)
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Explanation
Simple Explanation
(-12) का आधा (-6) और ((-6)2 =36) है। परीक्षा में चिन्ह से वर्ग का मान धनात्मक रहता है। / Half of (-12) is (-6), and ((-6)2 =36). Exam tip: the square remains positive.
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\(x^2+6x+9\) का न्यूनतम मान क्या है?
What is the minimum value of \(x^2+6x+9\)?
#minimum value
#perfect square
#quadratic expression
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A (-9)
B (0)
C (3)
D (9)
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Explanation
Simple Explanation
(x-2 +6x+9=(x+3)2 ) है और वर्ग का न्यूनतम मान (0) होता है। परीक्षा में पूर्ण वर्ग रूप पहचानें। / (x-2 +6x+9=(x+3)2 ), and the minimum value of a square is (0). Exam tip: recognise the perfect square form.
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\(x^2-4x+7\) का न्यूनतम मान क्या है?
What is the minimum value of \(x^2-4x+7\)?
#minimum value
#completing square
#quadratic expression
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A (2)
B (3)
C (4)
D (7)
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Explanation
Simple Explanation
(x-2 -4x+7=(x-2)2 +3) है। वर्ग का न्यूनतम (0) होने से मान (3) है। / (x-2 -4x+7=(x-2)2 +3). Since the minimum of a square is (0), the value is (3).
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\(x^2+2x+5\) को पूर्ण वर्ग और स्थिर पद के रूप में कैसे लिखेंगे?
How will \(x^2+2x+5\) be written as a square plus a constant?
#completing square
#quadratic expression
#standard transformation
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A ((x+1)2 +4)
B ((x+2)2 +1)
C ((x-1)2 +4)
D ((x+1)2 -4)
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Correct Answer
A. ((x+1)2 +4)
Explanation
Simple Explanation
\(x^2+2x+1\) को ((x+1)2 ) बनाकर (4) शेष रहता है। परीक्षा में जोड़ और घटाव संतुलित रखें। / Make \(x^2+2x+1\) as ((x+1)2 ), leaving (4). Exam tip: keep addition and subtraction balanced.
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\(2x^2+8x+6\) में (2) बाहर निकालने के बाद ब्रैकेट में क्या बचेगा?
After taking out (2) from \(2x^2+8x+6\), what remains inside the bracket?
#common factor
#quadratic expression
#simplification
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A \(x^2+4x+3\)
B \(x^2+8x+6\)
C \(2x^2+4x+3\)
D \(x^2+2x+3\)
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Correct Answer
A. \(x^2+4x+3\)
Explanation
Simple Explanation
हर पद को (2) से भाग देने पर \(x^2+4x+3\) मिलता है। परीक्षा में सार्व गुणनखंड निकालने के बाद सभी पद जांचें। / Dividing each term by (2) gives \(x^2+4x+3\). Exam tip: after taking a common factor, check all terms.
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\(3x^2+12x+12\) का सही रूप कौन सा है?
Which is the correct form of \(3x^2+12x+12\)?
#common factor
#perfect square
#quadratic expression
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A ((3x+2)2 )
B (3(x-2)2 )
C (3(x+4)2 )
D (3(x+2)2 )
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Correct Answer
D. (3(x+2)2 )
Explanation
Simple Explanation
(3x-2 +12x+12=3\(x^2+4x+4\)=3(x+2)2 ) है। परीक्षा में पहले (3) बाहर निकालें। / (3x-2 +12x+12=3\(x^2+4x+4\)=3(x+2)2 ). Exam tip: take out (3) first.
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कौन सा व्यंजक (x) में द्विघात नहीं है?
Which expression is not quadratic in (x)?
#degree
#not quadratic
#identification
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A \(x^2+1\)
B \(4x^2-7x\)
C \(x^3+x^2+1\)
D \(9-2x+x^2\)
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Correct Answer
C. \(x^3+x^2+1\)
Explanation
Simple Explanation
\(x^3+x^2+1\) की अधिकतम घात (3) है। परीक्षा में अधिकतम घात ही डिग्री बताती है। / The highest power of \(x^3+x^2+1\) is (3). Exam tip: the highest power tells the degree.
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\(x^2+8x+16-y^2\) का गुणनखंड रूप चुनिए।
Choose the factorised form of \(x^2+8x+16-y^2\).
#difference of squares
#completion
#quadratic expression
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A ( (x+4)(x+4-y) )
B ( (x-y+8)(x+y+2) )
C ( (x+y+4)2 )
D ( (x+4-y)(x+4+y) )
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Correct Answer
D. ( (x+4-y)(x+4+y) )
Explanation
Simple Explanation
इसे ((x+4)2 -y-2 ) लिखकर अंतर वर्ग पहचान लगती है। परीक्षा में पहले पूर्ण वर्ग बनाएं। / Write it as ((x+4)2 -y-2 ) and apply the difference of squares identity. Exam tip: form the perfect square first.
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((2x+1)(x-4)) का विस्तारित रूप क्या है?
What is the expanded form of ((2x+1)(x-4))?
#binomial product
#expansion
#quadratic expression
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A \(2x^2-7x-4\)
B \(2x^2+7x-4\)
C \(2x^2-8x+1\)
D \(2x^2-4\)
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Correct Answer
A. \(2x^2-7x-4\)
Explanation
Simple Explanation
\(2x^2-8x+x-4=2x^2-7x-4\) है। परीक्षा में समान पदों को अंत में जोड़ें। / \(2x^2-8x+x-4=2x^2-7x-4\). Exam tip: combine like terms at the end.
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((3x-2)(x+5)) का गुणनफल क्या है?
What is the product of ((3x-2)(x+5))?
#binomial product
#quadratic expression
#expansion
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A \(3x^2+13x-10\)
B \(3x^2-13x-10\)
C \(3x^2+15x-2\)
D \(3x^2+10x-5\)
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Correct Answer
A. \(3x^2+13x-10\)
Explanation
Simple Explanation
\(3x^2+15x-2x-10=3x^2+13x-10\) है। परीक्षा में मध्य पद बनाने वाले दोनों पद जोड़ें। / \(3x^2+15x-2x-10=3x^2+13x-10\). Exam tip: add the two terms forming the middle term.
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((x-7)(x+7)) का परिणाम क्या है?
What is the result of ((x-7)(x+7))?
#difference of squares
#binomial product
#quadratic expression
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A \(x^2+49\)
B \(x^2-14x+49\)
C \(x^2-49\)
D \(x^2+14x-49\)
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Correct Answer
C. \(x^2-49\)
Explanation
Simple Explanation
यह ((a-b)(a+b)=a-2 -b-2 ) का रूप है। परीक्षा में विपरीत चिन्ह वाले समान द्विपद तुरंत पहचानें। / This is the form ((a-b)(a+b)=a-2 -b-2 ). Exam tip: quickly identify conjugate binomials.
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((5x+2)2 ) में (x) वाले पद का गुणांक क्या होगा?
What will be the coefficient of the (x)-term in ((5x+2)2 )?
#coefficient
#perfect square
#quadratic expression
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A (10)
B (20)
C (25)
D (4)
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Explanation
Simple Explanation
मध्य पद \(2\cdot5x\cdot2=20x\) है। इसलिए (x) का गुणांक (20) है। / The middle term is \(2\cdot5x\cdot2=20x\). So the coefficient of (x) is (20).
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((4x-3)2 ) में स्थिर पद क्या होगा?
What will be the constant term in ((4x-3)2 )?
#constant term
#perfect square
#quadratic expression
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A (16)
B (-24)
C (9)
D (-9)
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Explanation
Simple Explanation
स्थिर पद ((-3)2 =9) होता है। परीक्षा में वर्ग करने पर ऋण चिन्ह धनात्मक बनता है। / The constant term is ((-3)2 =9). Exam tip: a negative sign becomes positive after squaring.
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\(x^2+ax+20\) में यदि गुणनखंड ((x+4)(x+5)) हैं तो (a) क्या है?
If the factors of \(x^2+ax+20\) are ((x+4)(x+5)), what is (a)?
#coefficient comparison
#factors
#quadratic expression
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A (9)
B (20)
C (4)
D (5)
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Explanation
Simple Explanation
((x+4)(x+5)=x-2 +9x+20) होता है। इसलिए (a=9) है। / ((x+4)(x+5)=x-2 +9x+20). Therefore (a=9).
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\(x^2-11x+b\) में यदि गुणनखंड ((x-6)(x-5)) हैं तो (b) क्या है?
If the factors of \(x^2-11x+b\) are ((x-6)(x-5)), what is (b)?
#constant comparison
#factors
#quadratic expression
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A (11)
B (30)
C (-30)
D (-11)
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Explanation
Simple Explanation
((x-6)(x-5)=x-2 -11x+30) है। इसलिए स्थिर पद (b=30) है। / ((x-6)(x-5)=x-2 -11x+30). Therefore the constant term is (b=30).
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\(x^2+3x-28\) में मध्य पद तोड़ने के लिए सही जोड़ी कौन सी है?
Which pair is correct for splitting the middle term in \(x^2+3x-28\)?
#middle term splitting
#quadratic expression
#factorisation
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A (7x) और (-4x) / (7x) and (-4x)
B (-7x) और (4x) / (-7x) and (4x)
C (14x) और (-2x) / (14x) and (-2x)
D (28x) और (-x) / (28x) and (-x)
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Correct Answer
A. (7x) और (-4x) / (7x) and (-4x)
Explanation
Simple Explanation
(7x-4x=3x) और (7\cdot(-4)=-28) है। परीक्षा में योग और गुणनफल दोनों मिलाएं। / (7x-4x=3x) and (7\cdot(-4)=-28). Exam tip: match both sum and product.
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\(2x^2+9x+10\) में मध्य पद तोड़ने की सही जोड़ी कौन सी है?
Which pair is correct for splitting the middle term in \(2x^2+9x+10\)?
#middle term splitting
#ac method
#quadratic expression
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A (4x) और (5x) / (4x) and (5x)
B (2x) और (7x) / (2x) and (7x)
C (5x) और (4x) / (5x) and (4x)
D (x) और (8x) / (x) and (8x)
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Correct Answer
C. (5x) और (4x) / (5x) and (4x)
Explanation
Simple Explanation
(5x+4x=9x) और \(5\cdot4=20\) जो \(2\cdot10\) के बराबर है। परीक्षा में (ac) विधि याद रखें। / (5x+4x=9x), and \(5\cdot4=20\), which equals \(2\cdot10\). Exam tip: remember the (ac) method.
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\(3x^2-8x+4\) में मध्य पद तोड़ने की सही जोड़ी कौन सी है?
Which pair correctly splits the middle term in \(3x^2-8x+4\)?
#middle term splitting
#ac method
#quadratic expression
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A (-6x) और (-2x) / (-6x) and (-2x)
B (-4x) और (-4x) / (-4x) and (-4x)
C (6x) और (2x) / (6x) and (2x)
D (-12x) और (4x) / (-12x) and (4x)
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Correct Answer
A. (-6x) और (-2x) / (-6x) and (-2x)
Explanation
Simple Explanation
(-6x-2x=-8x) और ((-6)(-2)=12) जो \(3\cdot4\) के बराबर है। परीक्षा में दोनों संख्याओं का गुणनफल (ac) होना चाहिए। / (-6x-2x=-8x), and ((-6)(-2)=12), which equals \(3\cdot4\). Exam tip: the product of the two numbers must be (ac).
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\(x^2+bx+15\) के गुणनखंड ((x+3)(x+5)) हों तो (b) कितना होगा?
If the factors of \(x^2+bx+15\) are ((x+3)(x+5)), what is (b)?
#coefficient comparison
#binomial factors
#quadratic expression
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A (3)
B (5)
C (15)
D (8)
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Explanation
Simple Explanation
द्विपदों के स्थिर भागों का योग (3+5=8) है। इसलिए (b=8) है। / The sum of the constant parts of the binomials is (3+5=8). Therefore (b=8).
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\(x^2+6x+c\) पूर्ण वर्ग त्रिपद हो और (c) धनात्मक हो तो (c) क्या है?
If \(x^2+6x+c\) is a perfect square trinomial and (c) is positive, what is (c)?
#perfect square
#missing constant
#quadratic expression
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A (3)
B (6)
C (9)
D (12)
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Explanation
Simple Explanation
(6) का आधा (3) है और \(3^2=9\) है। परीक्षा में आधे मध्य गुणांक का वर्ग लें। / Half of (6) is (3), and \(3^2=9\). Exam tip: square half of the middle coefficient.
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\(x^2-14x+c\) पूर्ण वर्ग त्रिपद हो तो (c) क्या होगा?
If \(x^2-14x+c\) is a perfect square trinomial, what will (c) be?
#perfect square
#missing constant
#quadratic expression
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A (14)
B (28)
C (49)
D (196)
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Explanation
Simple Explanation
(-14) का आधा (-7) और ((-7)2 =49) है। परीक्षा में स्थिर पद हमेशा वर्ग होता है। / Half of (-14) is (-7), and ((-7)2 =49). Exam tip: the constant term is a square.
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कौन सा व्यंजक (x) में द्विघात द्विपद है?
Which expression is a quadratic binomial in (x)?
#binomial
#quadratic expression
#degree
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A \(x^2+5x+6\)
B \(x^2-16\)
C (x+16)
D \(x^3-16\)
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Correct Answer
B. \(x^2-16\)
Explanation
Simple Explanation
\(x^2-16\) में दो पद हैं और अधिकतम घात (2) है। परीक्षा में द्विपद और द्विघात दोनों शर्तें जांचें। / \(x^2-16\) has two terms and highest power (2). Exam tip: check both binomial and quadratic conditions.
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\(5x^2-20\) को (5) बाहर निकालकर कैसे लिखा जाएगा?
How will \(5x^2-20\) be written after taking out (5)?
#common factor
#quadratic binomial
#simplification
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A (5\(x^2-20\))
B (5(x-4))
C (5\(x^2+4\))
D (5\(x^2-4\))
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Correct Answer
D. (5\(x^2-4\))
Explanation
Simple Explanation
\(5x^2\) और (-20) दोनों में (5) समान है। बाहर निकालने पर \(x^2-4\) बचता है। / Both \(5x^2\) and (-20) have (5) in common. After taking it out, \(x^2-4\) remains.
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\(2x^2+3x+1\) का गुणनखंड रूप कौन सा है?
Which is the factorised form of \(2x^2+3x+1\)?
#factorisation
#quadratic expression
#binomial factors
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A ((2x+1)(x+1))
B ((2x-1)(x-1))
C ((x+2)(x+1))
D ((2x+3)(x+1))
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Correct Answer
A. ((2x+1)(x+1))
Explanation
Simple Explanation
फैलाने पर \(2x^2+2x+x+1=2x^2+3x+1\) मिलता है। परीक्षा में विकल्प को फैलाकर जांचें। / Expanding gives \(2x^2+2x+x+1=2x^2+3x+1\). Exam tip: verify the option by expansion.
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\(x^2-5x+6\) का गुणनखंड रूप क्या है?
What is the factorised form of \(x^2-5x+6\)?
#factorisation
#quadratic expression
#middle term
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A ((x+2)(x+3))
B ((x-2)(x-3))
C ((x-1)(x-6))
D ((x+1)(x+6))
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Correct Answer
B. ((x-2)(x-3))
Explanation
Simple Explanation
(-2) और (-3) का योग (-5) और गुणनफल (6) है। परीक्षा में चिन्हों को स्थिर पद से मिलाएं। / The numbers (-2) and (-3) have sum (-5) and product (6). Exam tip: match signs with the constant term.
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\(3x^2+11x+6\) का सही गुणनखंड कौन सा है?
Which is the correct factorisation of \(3x^2+11x+6\)?
#factorisation
#ac method
#quadratic expression
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A ((3x+2)(x+3))
B ((3x+6)(x+1))
C ((x+2)(3x+3))
D ((3x-2)(x-3))
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Correct Answer
A. ((3x+2)(x+3))
Explanation
Simple Explanation
\(3x^2+9x+2x+6\) से (11x) बनता है। परीक्षा में (ac) विधि से सही जोड़ी चुनें। / \(3x^2+9x+2x+6\) gives (11x). Exam tip: choose the correct pair using the (ac) method.
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\(x^2+4x+4\) और \(x^2-4\) में मुख्य अंतर क्या है?
What is the main difference between \(x^2+4x+4\) and \(x^2-4\)?
#identity comparison
#perfect square
#difference of squares
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A पहला पूर्ण वर्ग है और दूसरा दो वर्गों का अंतर है / The first is a perfect square and the second is a difference of two squares
B दोनों रेखीय व्यंजक हैं / Both are linear expressions
C पहला घन है और दूसरा त्रिघात है / The first is a cube and the second is cubic
D दोनों में कोई पहचान लागू नहीं होती / No identity applies to either
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Correct Answer
A. पहला पूर्ण वर्ग है और दूसरा दो वर्गों का अंतर है / The first is a perfect square and the second is a difference of two squares
Explanation
Simple Explanation
(x-2 +4x+4=(x+2)2 ) और (x-2 -4=(x-2)(x+2)) है। परीक्षा में समान दिखने वाले द्विघातों की पहचान अलग करें। / (x-2 +4x+4=(x+2)2 ) and (x-2 -4=(x-2)(x+2)). Exam tip: distinguish similar-looking quadratics by identity.
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\(4x^2-9\) का गुणनखंड रूप क्या है?
What is the factorised form of \(4x^2-9\)?
#difference of squares
#quadratic expression
#factorisation
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A ( (2x-3)(2x+3) )
B ( (4x-3)(x+3) )
C ( (2x+3)2 )
D ( (2x-3)2 )
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Correct Answer
A. ( (2x-3)(2x+3) )
Explanation
Simple Explanation
(4x-2 =(2x)2 ) और \(9=3^2\) हैं इसलिए दो वर्गों का अंतर है। परीक्षा में \(a^2-b^2\) पहचान तुरंत लगाएं। / Here (4x-2 =(2x)2 ) and \(9=3^2\), so it is a difference of two squares. Exam tip: apply the \(a^2-b^2\) identity quickly.
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\(x^2-2x+1\) किस पूर्ण वर्ग के बराबर है?
Which perfect square is equal to \(x^2-2x+1\)?
#perfect square
#quadratic expression
#identity
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A ( (x+1)2 )
B ( (x-1)2 )
C ( (x-2)2 )
D \( x^2-1 \)
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Correct Answer
B. ( (x-1)2 )
Explanation
Simple Explanation
यह \(x^2-2\cdot x\cdot1+1^2\) के रूप में है। परीक्षा में ((a-b)2 ) में मध्य पद ऋणात्मक होता है। / It is in the form \(x^2-2\cdot x\cdot1+1^2\). Exam tip: in ((a-b)2 ), the middle term is negative.
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