समीकरण \(7x^2+2x-5=0\) में (a) का मान क्या है?
What is the value of (a) in \(7x^2+2x-5=0\)?
#quadratic equations
#coefficient
#a value
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A (7)
B (2)
C (-5)
D (0)
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Explanation
Simple Explanation
मानक रूप \(ax^2+bx+c=0\) में (a) \(x^2\) का गुणांक होता है। इसलिए (a=7) है। / In \(ax^2+bx+c=0\), (a) is the coefficient of \(x^2\). So (a=7).
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समीकरण \(5x^2-9x+4=0\) में (b) का मान क्या है?
What is the value of (b) in \(5x^2-9x+4=0\)?
#quadratic equations
#coefficient
#b value
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A (5)
B (-9)
C (4)
D (9)
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Explanation
Simple Explanation
मानक रूप में (b) (x) का गुणांक होता है। यहां (b=-9) है। / In standard form, (b) is the coefficient of (x). Here (b=-9).
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समीकरण \(8x^2+3x+12=0\) में (c) का मान क्या है?
What is the value of (c) in \(8x^2+3x+12=0\)?
#quadratic equations
#constant term
#c value
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A (8)
B (3)
C (12)
D (0)
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Explanation
Simple Explanation
मानक रूप में (c) स्थिर पद होता है। यहां स्थिर पद (12) है। / In standard form, (c) is the constant term. Here the constant term is (12).
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समीकरण \(11x^2-6x=0\) में (c) का मान क्या होगा?
What will be the value of (c) in \(11x^2-6x=0\)?
#quadratic equations
#missing constant
#standard form
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A (11)
B (-6)
C (0)
D (6)
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Explanation
Simple Explanation
इसे \(11x^2-6x+0=0\) लिखा जा सकता है। इसलिए (c=0) है। / It can be written as \(11x^2-6x+0=0\). So (c=0).
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समीकरण \(13x^2-20=0\) में (b) का मान क्या है?
What is the value of (b) in \(13x^2-20=0\)?
#quadratic equations
#missing linear term
#b value
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A (13)
B (0)
C (-20)
D (20)
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Explanation
Simple Explanation
इसे \(13x^2+0x-20=0\) लिखते हैं। इसलिए (b=0) है। / We write it as \(13x^2+0x-20=0\). So (b=0).
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किस शर्त पर \(px^2+qx+r=0\) द्विघात समीकरण होगा?
Under which condition will \(px^2+qx+r=0\) be a quadratic equation?
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#leading coefficient
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A (p=0)
B \(p\neq0\)
C (q=0)
D (r=0)
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Correct Answer
B. \(p\neq0\)
Explanation
Simple Explanation
द्विघात पद \(px^2\) बना रहे इसलिए \(p\neq0\) होना चाहिए। यदि (p=0) हो तो घात (2) नहीं रहेगी। / The quadratic term \(px^2\) must remain, so \(p\neq0\). If (p=0), degree (2) will not remain.
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समीकरण \(4x^2+7x=9\) का मानक रूप क्या है?
What is the standard form of \(4x^2+7x=9\)?
#quadratic equations
#standard form
#transposition
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A \(4x^2+7x+9=0\)
B \(4x^2+7x-9=0\)
C \(4x^2-7x-9=0\)
D \(4x^2-7x+9=0\)
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Correct Answer
B. \(4x^2+7x-9=0\)
Explanation
Simple Explanation
दाईं ओर के (9) को बाईं ओर लाने पर (-9) बनता है। इसलिए मानक रूप \(4x^2+7x-9=0\) है। / Moving (9) to the left makes it (-9). So the standard form is \(4x^2+7x-9=0\).
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समीकरण \(2x^2=5x+3\) का मानक रूप कौन सा है?
Which is the standard form of \(2x^2=5x+3\)?
#quadratic equations
#standard form
#sign change
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A \(2x^2-5x-3=0\)
B \(2x^2+5x+3=0\)
C \(2x^2-5x+3=0\)
D \(2x^2+5x-3=0\)
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Correct Answer
A. \(2x^2-5x-3=0\)
Explanation
Simple Explanation
सभी पद एक तरफ लाने पर \(2x^2-5x-3=0\) मिलता है। चिन्ह बदलना जरूरी है। / Bringing all terms to one side gives \(2x^2-5x-3=0\). Changing signs is important.
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यदि (x=3) है तो \(x^2-4x+3=0\) में बायां पक्ष कितना होगा?
If (x=3), what is the left side of \(x^2-4x+3=0\)?
#quadratic equations
#substitution
#solution check
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A (0)
B (3)
C (6)
D (-3)
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Explanation
Simple Explanation
रखने पर \(3^2-4\cdot3+3=0\) मिलता है। इसलिए (x=3) हल है। / Substitution gives \(3^2-4\cdot3+3=0\). So (x=3) is a solution.
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कौन सा मान \(x^2-25=0\) का एक हल है?
Which value is one solution of \(x^2-25=0\)?
#quadratic equations
#solution
#substitution
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A (2)
B (5)
C (7)
D (10)
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Explanation
Simple Explanation
\(5^2-25=0\) है। इसलिए (5) इस समीकरण का हल है। / Since \(5^2-25=0\), (5) is a solution of this equation.
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समीकरण \(x^2-8x+16=0\) में (x=4) रखने पर क्या मिलता है?
What do we get by putting (x=4) in \(x^2-8x+16=0\)?
#quadratic equations
#root checking
#perfect square
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A (0=0)
B (4=0)
C (8=0)
D (-4=0)
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Explanation
Simple Explanation
\(4^2-8\cdot4+16=0\) मिलता है। इसलिए (x=4) समीकरण को संतुष्ट करता है। / We get \(4^2-8\cdot4+16=0\). So (x=4) satisfies the equation.
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समीकरण \(12x^2=0\) के लिए (a), (b), (c) क्रमशः क्या हैं?
For \(12x^2=0\), what are (a), (b), (c) respectively?
#quadratic equations
#coefficients
#pure quadratic
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A (12,0,0)
B (0,12,0)
C (12,1,0)
D (0,0,12)
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Correct Answer
A. (12,0,0)
Explanation
Simple Explanation
इसे \(12x^2+0x+0=0\) लिखा जाता है। इसलिए (a=12), (b=0), (c=0) हैं। / It is written as \(12x^2+0x+0=0\). Therefore (a=12), (b=0), (c=0).
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(2x(x+7)=0) को मानक रूप में लिखिए।
Write (2x(x+7)=0) in standard form.
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#expansion
#standard form
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A \(2x^2+14x=0\)
B \(2x^2-14x=0\)
C \(14x^2+2x=0\)
D (2x+7=0)
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Correct Answer
A. \(2x^2+14x=0\)
Explanation
Simple Explanation
(2x) को कोष्ठक के दोनों पदों से गुणा करें। इससे \(2x^2+14x=0\) मिलता है। / Multiply (2x) by both terms inside the bracket. This gives \(2x^2+14x=0\).
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((x+4)(x+5)=0) का विस्तृत रूप क्या है?
What is the expanded form of ((x+4)(x+5)=0)?
#quadratic equations
#binomial expansion
#standard form
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A \(x^2+9x+20=0\)
B \(x^2+20x+9=0\)
C \(x^2-9x+20=0\)
D \(x^2+9x-20=0\)
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Correct Answer
A. \(x^2+9x+20=0\)
Explanation
Simple Explanation
विस्तार करने पर \(x^2+5x+4x+20=0\) मिलता है। समान पद जोड़कर \(x^2+9x+20=0\) बनता है। / Expanding gives \(x^2+5x+4x+20=0\). Combining like terms gives \(x^2+9x+20=0\).
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((x-6)(x+2)=0) का मानक रूप कौन सा है?
Which is the standard form of ((x-6)(x+2)=0)?
#quadratic equations
#expansion
#standard form
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A \(x^2-4x-12=0\)
B \(x^2+4x-12=0\)
C \(x^2-8x+12=0\)
D \(x^2+8x+12=0\)
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Correct Answer
A. \(x^2-4x-12=0\)
Explanation
Simple Explanation
विस्तार से \(x^2+2x-6x-12=0\) मिलता है। इसलिए \(x^2-4x-12=0\) सही है। / Expansion gives \(x^2+2x-6x-12=0\). So \(x^2-4x-12=0\) is correct.
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समीकरण \(x^2+12x+36=0\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(x^2+12x+36=0\)?
#quadratic equations
#implicit coefficient
#coefficient
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A (0)
B (1)
C (12)
D (36)
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Explanation
Simple Explanation
जब \(x^2\) के आगे कोई संख्या नहीं लिखी होती तब गुणांक (1) होता है। यह अक्सर पूछी जाने वाली बात है। / When no number is written before \(x^2\), its coefficient is (1). This is often asked.
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समीकरण \(-2x^2+5x-1=0\) में (a) का मान क्या है?
What is the value of (a) in \(-2x^2+5x-1=0\)?
#quadratic equations
#negative coefficient
#a value
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A (2)
B (-2)
C (5)
D (-1)
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Explanation
Simple Explanation
\(x^2\) का गुणांक (-2) है। इसलिए मानक रूप में (a=-2) है। / The coefficient of \(x^2\) is (-2). So in standard form (a=-2).
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कौन सा विकल्प \(x^2+10x+25=0\) को गुणनखंड रूप में दिखाता है?
Which option shows \(x^2+10x+25=0\) in factor form?
#quadratic equations
#factor form
#perfect square
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A ((x+5)2 =0)
B ((x-5)2 =0)
C ((x+10)2 =0)
D ((x+25)2 =0)
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Correct Answer
A. ((x+5)2 =0)
Explanation
Simple Explanation
\(x^2+10x+25\) पूर्ण वर्ग है। यह ((x+5)2 ) के बराबर है। / \(x^2+10x+25\) is a perfect square. It equals ((x+5)2 ).
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कौन सा मान \(x^2-3x-10=0\) का हल है?
Which value is a solution of \(x^2-3x-10=0\)?
#quadratic equations
#solution check
#substitution
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A (1)
B (2)
C (5)
D (10)
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Explanation
Simple Explanation
\(5^2-3\cdot5-10=0\) है। इसलिए (x=5) हल है। / Since \(5^2-3\cdot5-10=0\), (x=5) is a solution.
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यदि किसी समीकरण में चर की सबसे बड़ी घात (2) है तो उसे क्या कहा जाता है?
If the highest power of the variable in an equation is (2), what is it called?
#quadratic equations
#definition
#degree
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A रैखिक समीकरण / Linear equation
B द्विघात समीकरण / Quadratic equation
C घन समीकरण / Cubic equation
D चर रहित समीकरण / Equation without variable
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Correct Answer
B. द्विघात समीकरण / Quadratic equation
Explanation
Simple Explanation
सबसे बड़ी घात (2) होने पर समीकरण द्विघात कहलाता है। घात पहचानना पहला कदम है। / When the highest power is (2), the equation is called quadratic. Identifying degree is the first step.
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निम्न में से किसमें \(x^2\) पद स्पष्ट रूप से है?
Which of the following clearly contains the \(x^2\) term?
#quadratic equations
#quadratic term
#recognition
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A (10x-1=0)
B (2x+9=0)
C \(4x^2+1=0\)
D (x+12=0)
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Correct Answer
C. \(4x^2+1=0\)
Explanation
Simple Explanation
द्विघात पद \(x^2\) वाला पद होता है। विकल्प (C) में \(4x^2\) है। / The quadratic term is the term containing \(x^2\). Option (C) has \(4x^2\).
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समीकरण \(9x^2+0x+2=0\) में रैखिक पद क्या है?
What is the linear term in \(9x^2+0x+2=0\)?
#quadratic equations
#linear term
#term identification
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A \(9x^2\)
B (0x)
C (2)
D (9x)
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Explanation
Simple Explanation
रैखिक पद (x) वाला पद होता है। यहां रैखिक पद (0x) है। / The linear term is the term containing (x). Here the linear term is (0x).
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कौन सा समीकरण \(x^2-6x+9=0\) के बराबर है?
Which equation is equivalent to \(x^2-6x+9=0\)?
#quadratic equations
#perfect square
#equivalent form
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A ((x-3)2 =0)
B ((x+3)2 =0)
C ((x-6)2 =0)
D ((x+6)2 =0)
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Correct Answer
A. ((x-3)2 =0)
Explanation
Simple Explanation
((x-3)2 =x-2 -6x+9) होता है। पूर्ण वर्ग पहचानने से समय बचता है। / ((x-3)2 =x-2 -6x+9). Recognising perfect squares saves time.
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\(x^2-49=0\) को गुणनखंड रूप में कैसे लिखेंगे?
How do we write \(x^2-49=0\) in factor form?
#quadratic equations
#difference of squares
#factor form
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A ((x-7)(x+7)=0)
B ((x-49)(x+1)=0)
C ((x+7)(x+7)=0)
D ((x-7)(x-7)=0)
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Correct Answer
A. ((x-7)(x+7)=0)
Explanation
Simple Explanation
\(x^2-49\) वर्गों का अंतर है। इसलिए यह ((x-7)(x+7)) बनता है। / \(x^2-49\) is a difference of squares. Hence it becomes ((x-7)(x+7)).
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यदि (x=2) है तो \(x^2+5x-14=0\) में बायां पक्ष कितना होगा?
If (x=2), what is the left side of \(x^2+5x-14=0\)?
#quadratic equations
#substitution
#root
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A (0)
B (2)
C (4)
D (-14)
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Explanation
Simple Explanation
रखने पर \(2^2+5\cdot2-14=0\) मिलता है। इसलिए (2) एक हल है। / Substituting gives \(2^2+5\cdot2-14=0\). So (2) is a solution.
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समीकरण \(3x^2-21=0\) में (a), (b), (c) कौन से हैं?
What are (a), (b), (c) in \(3x^2-21=0\)?
#quadratic equations
#coefficients
#missing term
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A (3,0,-21)
B (3,-21,0)
C (0,3,-21)
D (-21,0,3)
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Correct Answer
A. (3,0,-21)
Explanation
Simple Explanation
इसे \(3x^2+0x-21=0\) लिखें। इसलिए (a=3), (b=0), (c=-21) हैं। / Write it as \(3x^2+0x-21=0\). So (a=3), (b=0), (c=-21).
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कौन सा समीकरण (t) में द्विघात है?
Which equation is quadratic in (t)?
#quadratic equations
#variable
#degree
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A \(t^2+3t+2=0\)
B \(x^2+3x+2=0\)
C (t+3=0)
D (3t-2=0)
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Correct Answer
A. \(t^2+3t+2=0\)
Explanation
Simple Explanation
विकल्प (A) में चर (t) की सबसे बड़ी घात (2) है। इसलिए यह (t) में द्विघात है। / In option (A), the variable (t) has highest power (2). So it is quadratic in (t).
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(4x(x-3)=0) का मानक रूप क्या है?
What is the standard form of (4x(x-3)=0)?
#quadratic equations
#expansion
#standard form
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A \(4x^2-12x=0\)
B \(4x^2+12x=0\)
C \(x^2-12x=0\)
D (4x-12=0)
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Correct Answer
A. \(4x^2-12x=0\)
Explanation
Simple Explanation
(4x) को दोनों पदों से गुणा करने पर \(4x^2-12x=0\) मिलता है। ऋण चिन्ह पर ध्यान दें। / Multiplying (4x) by both terms gives \(4x^2-12x=0\). Pay attention to the negative sign.
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यदि (p(x)=x-2 -4) है तो (p(2)) कितना है?
If (p(x)=x-2 -4), what is (p(2))?
#quadratic equations
#polynomial value
#zero
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A (0)
B (2)
C (4)
D (-4)
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Explanation
Simple Explanation
(p(2)=22 -4=0) है। इसलिए (2) इस बहुपद का शून्यक है। / (p(2)=22 -4=0). So (2) is a zero of this polynomial.
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कौन सा विकल्प \(6x^2+x-8=0\) में स्थिर पद है?
Which option is the constant term in \(6x^2+x-8=0\)?
#quadratic equations
#constant term
#term identification
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A \(6x^2\)
B (x)
C (-8)
D (0)
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Explanation
Simple Explanation
स्थिर पद में चर नहीं होता। यहां स्थिर पद (-8) है। / The constant term has no variable. Here the constant term is (-8).
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समीकरण \(x^2-13x=0\) में कौन सा पद अनुपस्थित है?
Which term is absent in \(x^2-13x=0\)?
#quadratic equations
#missing term
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A द्विघात पद / Quadratic term
B रैखिक पद / Linear term
C स्थिर पद / Constant term
D चर पद / Variable term
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Correct Answer
C. स्थिर पद / Constant term
Explanation
Simple Explanation
इसे \(x^2-13x+0=0\) लिखा जा सकता है। इसलिए स्थिर पद अनुपस्थित है। / It can be written as \(x^2-13x+0=0\). So the constant term is absent.
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कौन सा समीकरण शुद्ध द्विघात समीकरण है?
Which equation is a pure quadratic equation?
#quadratic equations
#pure quadratic
#recognition
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A \(4x^2-16=0\)
B \(x^2+5x+6=0\)
C (x+16=0)
D \(x^3-16=0\)
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Correct Answer
A. \(4x^2-16=0\)
Explanation
Simple Explanation
शुद्ध द्विघात में (x) वाला रैखिक पद नहीं होता। \(4x^2-16=0\) ऐसा समीकरण है। / A pure quadratic has no linear (x) term. \(4x^2-16=0\) is such an equation.
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\(x^2+6x+9=0\) में (x=-3) रखने पर क्या होगा?
What happens when (x=-3) is put in \(x^2+6x+9=0\)?
#quadratic equations
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A समीकरण संतुष्ट होता है / The equation is satisfied
B समीकरण असत्य होता है / The equation is false
C बायां पक्ष (6) होता है / The left side is (6)
D बायां पक्ष (-6) होता है / The left side is (-6)
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Correct Answer
A. समीकरण संतुष्ट होता है / The equation is satisfied
Explanation
Simple Explanation
((-3)2 +6(-3)+9=0) है। अतः (x=-3) हल है। / ((-3)2 +6(-3)+9=0). Hence (x=-3) is a solution.
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कौन सा रूप (a=3), (b=-4), (c=-2) को दर्शाता है?
Which form represents (a=3), (b=-4), (c=-2)?
#quadratic equations
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A \(3x^2-4x-2=0\)
B \(3x^2+4x-2=0\)
C \(3x^2-2x-4=0\)
D \(4x^2-3x-2=0\)
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Correct Answer
A. \(3x^2-4x-2=0\)
Explanation
Simple Explanation
मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(3x^2-4x-2=0\) मिलता है। (b) का चिन्ह ध्यान रखें। / Putting the values in \(ax^2+bx+c=0\) gives \(3x^2-4x-2=0\). Watch the sign of (b).
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यदि (a=2), (b=0), (c=-18) हैं तो समीकरण क्या होगा?
If (a=2), (b=0), (c=-18), what is the equation?
#quadratic equations
#forming equation
#standard form
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A \(2x^2-18=0\)
B \(2x^2+18=0\)
C \(2x^2+18x=0\)
D \(18x^2-2=0\)
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Correct Answer
A. \(2x^2-18=0\)
Explanation
Simple Explanation
मानक रूप में रखने पर \(2x^2+0x-18=0\) मिलता है। इसे \(2x^2-18=0\) लिखते हैं। / Substituting in standard form gives \(2x^2+0x-18=0\). This is written as \(2x^2-18=0\).
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कौन सा समीकरण मानक रूप में लाने पर \(x^2+2x-8=0\) बनता है?
Which equation becomes \(x^2+2x-8=0\) after writing in standard form?
#quadratic equations
#standard form
#reverse form
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A \(x^2+2x=8\)
B \(x^2+2x=-8\)
C \(x^2-2x=8\)
D \(x^2-2x=-8\)
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Correct Answer
A. \(x^2+2x=8\)
Explanation
Simple Explanation
(8) को बाईं ओर लाने पर (-8) बनता है। इसलिए \(x^2+2x-8=0\) मिलता है। / Moving (8) to the left makes it (-8). So we get \(x^2+2x-8=0\).
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\(2x^2+7x+3=0\) के अधिकतम कितने वास्तविक हल हो सकते हैं?
What is the maximum number of real solutions possible for \(2x^2+7x+3=0\)?
#quadratic equations
#number of solutions
#degree
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A (1)
B (2)
C (3)
D (4)
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Explanation
Simple Explanation
द्विघात समीकरण के अधिकतम (2) वास्तविक हल हो सकते हैं। घात से अधिकतम हलों का संकेत मिलता है। / A quadratic equation can have at most (2) real solutions. The degree indicates the maximum number of solutions.
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समीकरण \(5x^2+5x+5=0\) में (a+b+c) का मान क्या है?
What is the value of (a+b+c) for \(5x^2+5x+5=0\)?
#quadratic equations
#coefficients
#sum
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A (5)
B (10)
C (15)
D (25)
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Explanation
Simple Explanation
यहां (a=5), (b=5), (c=5) हैं। इसलिए (a+b+c=15) है। / Here (a=5), (b=5), (c=5). Therefore (a+b+c=15).
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समीकरण \(4x^2-2x-6=0\) में (a-b+c) का मान क्या है?
What is the value of (a-b+c) for \(4x^2-2x-6=0\)?
#quadratic equations
#coefficients
#expression value
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A (0)
B (2)
C (4)
D (8)
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Explanation
Simple Explanation
यहां (a=4), (b=-2), (c=-6) हैं। इसलिए (a-b+c=4-(-2)-6=0) है। / Here (a=4), (b=-2), (c=-6). Thus (a-b+c=4-(-2)-6=0).
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\(6x^2-5x+2=0\) की घात क्या है?
What is the degree of \(6x^2-5x+2=0\)?
#quadratic equations
#degree
#identification
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A (0)
B (1)
C (2)
D (6)
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Explanation
Simple Explanation
सबसे बड़ी घात (2) है। इसलिए यह द्विघात समीकरण है। / The highest power is (2). Therefore it is a quadratic equation.
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कौन सा विकल्प \(x^2+x-12=0\) का गुणनखंड रूप है?
Which option is the factor form of \(x^2+x-12=0\)?
#quadratic equations
#factor form
#verification
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A ((x+4)(x-3)=0)
B ((x-4)(x+3)=0)
C ((x+4)(x+3)=0)
D ((x-4)(x-3)=0)
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Correct Answer
A. ((x+4)(x-3)=0)
Explanation
Simple Explanation
((x+4)(x-3)) फैलाने पर \(x^2+x-12\) मिलता है। गुणनखंड जांचने के लिए विस्तार करें। / Expanding ((x+4)(x-3)) gives \(x^2+x-12\). To check factors, expand them.
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यदि एक वर्ग की भुजा (x+2) है और क्षेत्रफल (49) है तो समीकरण क्या बनेगा?
If the side of a square is (x+2) and the area is (49), what equation is formed?
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#word problem
#area
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A ((x+2)2 =49)
B (x+2=49)
C (2x+2=49)
D \(x^2+2=49\)
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Correct Answer
A. ((x+2)2 =49)
Explanation
Simple Explanation
वर्ग का क्षेत्रफल भुजा का वर्ग होता है। इसलिए समीकरण ((x+2)2 =49) बनेगा। / The area of a square is the square of its side. So the equation is ((x+2)2 =49).
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दो लगातार धन सम संख्याओं का गुणनफल (48) है। यदि छोटी संख्या (x) है तो समीकरण क्या होगा?
The product of two consecutive positive even numbers is (48). If the smaller number is (x), what is the equation?
#quadratic equations
#word problem
#consecutive even numbers
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A (x(x+2)=48)
B (x(x+1)=48)
C (x+x+2=48)
D (2x=48)
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Correct Answer
A. (x(x+2)=48)
Explanation
Simple Explanation
लगातार सम संख्या (x+2) होगी। इसलिए गुणनफल का समीकरण (x(x+2)=48) है। / The next consecutive even number is (x+2). So the product equation is (x(x+2)=48).
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किस विकल्प में गलती है जब \(x^2=6x+7\) को मानक रूप में बदला जाता है?
Which option shows the mistake while converting \(x^2=6x+7\) to standard form?
#quadratic equations
#common mistake
#standard form
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A \(x^2-6x-7=0\)
B \(x^2+6x+7=0\)
C \(x^2-6x=7\)
D \(x^2=6x+7\)
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Correct Answer
B. \(x^2+6x+7=0\)
Explanation
Simple Explanation
सही मानक रूप \(x^2-6x-7=0\) है। विकल्प (B) में दाईं ओर के पदों के चिन्ह नहीं बदले गए। / The correct standard form is \(x^2-6x-7=0\). In option (B), the signs of the right-side terms were not changed.
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((x+3)2 =25) को मानक रूप में लिखने पर कौन सा समीकरण मिलेगा?
Which equation is obtained when ((x+3)2 =25) is written in standard form?
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#standard form
#perfect square
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A \(x^2+6x-16=0\)
B \(x^2+6x+16=0\)
C \(x^2+3x-25=0\)
D \(x^2+9x-25=0\)
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Correct Answer
A. \(x^2+6x-16=0\)
Explanation
Simple Explanation
((x+3)2 =x-2 +6x+9) है और (25) को बाईं ओर लाने पर (-25) बनता है। इसलिए \(x^2+6x-16=0\) सही है। / Here ((x+3)2 =x-2 +6x+9), and moving (25) left gives (-25). So \(x^2+6x-16=0\) is correct.
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समीकरण ((k-1)x-2 +3x+2=0) द्विघात रहे इसके लिए कौन सी शर्त सही है?
Which condition is correct for ((k-1)x-2 +3x+2=0) to remain quadratic?
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#parameter
#leading coefficient
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A (k=1)
B \(k\neq1\)
C (k=0)
D (k=-1)
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Correct Answer
B. \(k\neq1\)
Explanation
Simple Explanation
द्विघात पद का गुणांक ((k-1)) है जो (0) नहीं होना चाहिए। इसलिए \(k\neq1\) होना जरूरी है। / The coefficient of the quadratic term is ((k-1)), which must not be (0). Hence \(k\neq1\) is necessary.
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द्विघात समीकरण के बारे में कौन सा कथन गलत है?
Which statement about a quadratic equation is false?
#quadratic equations
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#concept clarity
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A इसकी घात (2) होती है / Its degree is (2)
B मानक रूप \(ax^2+bx+c=0\) है / Its standard form is \(ax^2+bx+c=0\)
C इसमें \(a\neq0\) होना चाहिए / It must have \(a\neq0\)
D इसमें हमेशा \(c\neq0\) होना चाहिए / It must always have \(c\neq0\)
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Correct Answer
D. इसमें हमेशा \(c\neq0\) होना चाहिए / It must always have \(c\neq0\)
Explanation
Simple Explanation
द्विघात समीकरण में (c) (0) भी हो सकता है। जरूरी शर्त केवल \(a\neq0\) है। / In a quadratic equation, (c) can also be (0). The necessary condition is only \(a\neq0\).
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((2x+1)(x-4)=0) का विस्तृत रूप क्या है?
What is the expanded form of ((2x+1)(x-4)=0)?
#quadratic equations
#expansion
#binomial product
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A \(2x^2-7x-4=0\)
B \(2x^2+7x-4=0\)
C \(2x^2-8x+1=0\)
D \(2x^2-7x+4=0\)
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Correct Answer
A. \(2x^2-7x-4=0\)
Explanation
Simple Explanation
विस्तार करने पर \(2x^2-8x+x-4=0\) मिलता है। समान पद जोड़कर \(2x^2-7x-4=0\) बनता है। / Expanding gives \(2x^2-8x+x-4=0\). Combining like terms gives \(2x^2-7x-4=0\).
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यदि (x=-1) समीकरण \(x^2+mx-6=0\) का हल है तो (m) का मान क्या होगा?
If (x=-1) is a solution of \(x^2+mx-6=0\), what is the value of (m)?
#quadratic equations
#solution
#parameter
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A (5)
B (-5)
C (7)
D (-7)
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Explanation
Simple Explanation
(x=-1) रखने पर (1-m-6 =0) मिलता है। इसलिए (-m-5 =0) और (m=-5) है। / Putting (x=-1) gives (1-m-6 =0). So (-m-5 =0) and (m=-5).
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किसी संख्या का वर्ग उस संख्या के (5) गुने से (6) अधिक है। यदि संख्या (x) है तो समीकरण क्या होगा?
The square of a number is (6) more than (5) times the number. If the number is (x), what is the equation?
#quadratic equations
#word problem
#forming equation
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A \(x^2=5x+6\)
B \(x^2+5x=6\)
C \(5x^2=x+6\)
D \(x^2=6x+5\)
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Correct Answer
A. \(x^2=5x+6\)
Explanation
Simple Explanation
संख्या का वर्ग \(x^2\) और (5) गुने से (6) अधिक (5x+6) है। इसलिए समीकरण \(x^2=5x+6\) बनेगा। / The square is \(x^2\), and (6) more than (5) times the number is (5x+6). So the equation is \(x^2=5x+6\).
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