निम्न में से कौन सा समीकरण द्विघात समीकरण है?
Which of the following equations is a quadratic equation?
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A \(x^2+3x+2=0\)
B (2x+5=0)
C \(x^3+x=0\)
D (7=0)
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Correct Answer
A. \(x^2+3x+2=0\)
Explanation
Simple Explanation
द्विघात समीकरण में (x) की सबसे बड़ी घात (2) होती है। परीक्षा में सबसे पहले घात देखें। / A quadratic equation has highest power (2) of (x). In exams first check the degree.
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समीकरण \(5x^2-2x+9=0\) में (a) का मान क्या है?
What is the value of (a) in the equation \(5x^2-2x+9=0\)?
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A (5)
B \(-2\)
C (9)
D (0)
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Explanation
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मानक रूप \(ax^2+bx+c=0\) में (a) \(x^2\) का गुणांक होता है। यहां (a=5) है। / In \(ax^2+bx+c=0\), (a) is the coefficient of \(x^2\). Here (a=5).
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समीकरण \(3x^2+7x-4=0\) में (b) का मान क्या है?
What is the value of (b) in \(3x^2+7x-4=0\)?
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A (3)
B (7)
C \(-4\)
D (0)
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Explanation
Simple Explanation
मानक रूप में (b) (x) का गुणांक होता है। इसलिए (b=7) है। / In standard form, (b) is the coefficient of (x). So (b=7).
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समीकरण \(4x^2-8x+1=0\) में (c) का मान क्या है?
What is the value of (c) in \(4x^2-8x+1=0\)?
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A (4)
B \(-8\)
C (1)
D \(-1\)
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Explanation
Simple Explanation
मानक रूप में (c) स्थिर पद होता है। यहां स्थिर पद (1) है। / In standard form, (c) is the constant term. Here the constant term is (1).
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निम्न समीकरण \(x^2-6x=0\) में (c) का मान क्या है?
What is the value of (c) in \(x^2-6x=0\)?
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A (1)
B \(-6\)
C (0)
D (6)
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Explanation
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इसे \(x^2-6x+0=0\) लिखा जा सकता है। अतः (c=0) है। / It can be written as \(x^2-6x+0=0\). Hence (c=0).
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समीकरण \(9x^2+11=0\) में \(x\) का मान क्या है?
What is the value of \(x\) in \(9x^2+11=0\)?
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A (9)
B (11)
C (0)
D \(-11\)
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Explanation
Simple Explanation
इसे \(9x^2+0x+11=0\) लिखा जाता है। इसलिए \(x=0\) है। / It is written as \(9x^2+0x+11=0\). So \(x=0\).
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किस शर्त पर \(ax^2+bx+c=0\) द्विघात समीकरण कहलाता है?
Under which condition is \(ax^2+bx+c=0\) called a quadratic equation?
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A (a=0)
B \(a\neq0\)
C (b=0)
D (c=0)
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Correct Answer
B. \(a\neq0\)
Explanation
Simple Explanation
द्विघात पद बना रहे इसलिए \(a\neq0\) होना चाहिए। परीक्षा में (a=0) होने पर यह रैखिक बन सकता है। / The quadratic term must remain, so \(a\neq0\). If (a=0), it may become linear.
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समीकरण \(2x^2+5x=3\) का मानक रूप क्या है?
What is the standard form of \(2x^2+5x=3\)?
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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
B. \(2x^2+5x-3=0\)
Explanation
Simple Explanation
सभी पद एक तरफ लाने पर \(2x^2+5x-3=0\) मिलता है। चिन्ह बदलना न भूलें। / Bringing all terms to one side gives \(2x^2+5x-3=0\). Do not forget the sign change.
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समीकरण \(x^2=4x+12\) का मानक रूप कौन सा है?
Which is the standard form of \(x^2=4x+12\)?
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A \(x^2-4x-12=0\)
B \(x^2+4x+12=0\)
C \(x^2-4x+12=0\)
D \(x^2+4x-12=0\)
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Correct Answer
A. \(x^2-4x-12=0\)
Explanation
Simple Explanation
दाईं ओर के पदों को बाईं ओर लाने पर चिन्ह बदलते हैं। इसलिए \(x^2-4x-12=0\) सही है। / When terms from the right side move left, their signs change. Thus \(x^2-4x-12=0\) is correct.
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कौन सा समीकरण \(ax^2+bx+c=0\) के मानक रूप में है?
Which equation is in the standard form \(ax^2+bx+c=0\)?
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A \(x^2+2x+1=0\)
B \(x^2+2x=1\)
C \(x^2=2x+1\)
D (2x+1=0)
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Correct Answer
A. \(x^2+2x+1=0\)
Explanation
Simple Explanation
मानक रूप में दाईं ओर (0) होता है। विकल्प (A) इसी रूप में है। / In standard form the right side is (0). Option (A) matches this form.
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यदि (x=2) है तो \(x^2-5x+6=0\) में बायां पक्ष कितना होगा?
If (x=2), what is the left side of \(x^2-5x+6=0\)?
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A (0)
B (2)
C \(-2\)
D (6)
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Explanation
Simple Explanation
रखने पर \(2^2-5\cdot2+6=0\) मिलता है। इसलिए (x=2) समीकरण का हल है। / Substitution gives \(2^2-5\cdot2+6=0\). So (x=2) is a solution.
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कौन सा मान \(x^2-9=0\) का एक हल है?
Which value is one solution of \(x^2-9=0\)?
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A (2)
B (3)
C (4)
D (5)
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Explanation
Simple Explanation
\(3^2-9=0\) इसलिए (3) हल है। आसान प्रश्नों में मान रखकर जांच करें। / Since \(3^2-9=0\), (3) is a solution. For easy questions, check by substitution.
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समीकरण \(x^2-4x+4=0\) में (x=2) रखने पर क्या मिलता है?
What do we get by putting (x=2) in \(x^2-4x+4=0\)?
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A (0=0)
B (2=0)
C (4=0)
D \(-4=0\)
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Explanation
Simple Explanation
\(2^2-4\cdot2+4=0\) है। अतः (x=2) सही हल है। / We get \(2^2-4\cdot2+4=0\). Hence (x=2) is a correct solution.
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निम्न में से कौन सा द्विघात बहुपद है?
Which of the following is a quadratic polynomial?
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A (7x+1)
B \(x^2-3x+2\)
C \(x^3-1\)
D (5)
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Correct Answer
B. \(x^2-3x+2\)
Explanation
Simple Explanation
द्विघात बहुपद की घात (2) होती है। \(x^2-3x+2\) में सबसे बड़ी घात (2) है। / A quadratic polynomial has degree (2). In \(x^2-3x+2\), the highest power is (2).
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कौन सा समीकरण द्विघात नहीं है?
Which equation is not quadratic?
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A \(x^2+x+1=0\)
B \(2x^2-3=0\)
C \(x^3+x+1=0\)
D \(4x^2=7\)
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Correct Answer
C. \(x^3+x+1=0\)
Explanation
Simple Explanation
\(x^3+x+1=0\) की घात (3) है। इसलिए यह द्विघात समीकरण नहीं है। / The degree of \(x^3+x+1=0\) is (3). So it is not a quadratic equation.
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समीकरण \(6x^2=0\) के लिए (a), (b), (c) क्रमशः क्या हैं?
For \(6x^2=0\), what are (a), (b), (c) respectively?
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A (6,0,0)
B (0,6,0)
C (6,1,0)
D (0,0,6)
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Correct Answer
A. (6,0,0)
Explanation
Simple Explanation
इसे \(6x^2+0x+0=0\) लिखा जाता है। इसलिए (a=6), (b=0), (c=0) हैं। / It is written as \(6x^2+0x+0=0\). Therefore (a=6), (b=0), (c=0).
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(x(x+5)=0) को मानक रूप में लिखिए।
Write (x(x+5)=0) in standard form.
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A \(x^2+5x=0\)
B \(x^2-5x=0\)
C \(5x^2+x=0\)
D (x+5=0)
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Correct Answer
A. \(x^2+5x=0\)
Explanation
Simple Explanation
गुणा करने पर \(x^2+5x=0\) मिलता है। कोष्ठक खोलते समय हर पद से गुणा करें। / Multiplying gives \(x^2+5x=0\). While opening brackets, multiply each term.
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((x+2)(x+3)=0) का विस्तृत रूप क्या है?
What is the expanded form of ((x+2)(x+3)=0)?
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A \(x^2+5x+6=0\)
B \(x^2+6x+5=0\)
C \(x^2-5x+6=0\)
D \(x^2+5x-6=0\)
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Correct Answer
A. \(x^2+5x+6=0\)
Explanation
Simple Explanation
विस्तार से \(x^2+3x+2x+6=0\) मिलता है। समान पद जोड़कर \(x^2+5x+6=0\) बनता है। / Expansion gives \(x^2+3x+2x+6=0\). Combining like terms gives \(x^2+5x+6=0\).
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((x-4)(x+1)=0) का मानक रूप कौन सा है?
Which is the standard form of ((x-4)(x+1)=0)?
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A \(x^2-3x-4=0\)
B \(x^2+3x-4=0\)
C \(x^2-5x+4=0\)
D \(x^2+5x+4=0\)
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Correct Answer
A. \(x^2-3x-4=0\)
Explanation
Simple Explanation
विस्तार करने पर \(x^2+x-4x-4=0\) मिलता है। इसलिए \(x^2-3x-4=0\) सही है। / Expanding gives \(x^2+x-4x-4=0\). So \(x^2-3x-4=0\) is correct.
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समीकरण \(x^2+8x+16=0\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(x^2+8x+16=0\)?
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A (0)
B (1)
C (8)
D (16)
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Explanation
Simple Explanation
जब \(x^2\) के आगे कोई संख्या नहीं लिखी होती तब गुणांक (1) होता है। यह सामान्य परीक्षा गलती है। / When no number is written before \(x^2\), its coefficient is (1). This is a common exam mistake.
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समीकरण \(-x^2+3x+10=0\) में (a) का मान क्या है?
What is the value of (a) in \(-x^2+3x+10=0\)?
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A (1)
B \(-1\)
C (3)
D (10)
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Explanation
Simple Explanation
\(-x^2\) का गुणांक (-1) होता है। इसलिए (a=-1) है। / The coefficient of \(-x^2\) is (-1). So (a=-1).
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कौन सा विकल्प \(x^2+6x+9=0\) को गुणनखंड रूप में दिखाता है?
Which option shows \(x^2+6x+9=0\) in factor form?
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A \((x+3)^2=0\)
B \((x-3)^2=0\)
C \((x+6)^2=0\)
D \((x+9)^2=0\)
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Correct Answer
A. \((x+3)^2=0\)
Explanation
Simple Explanation
\(x^2+6x+9\) एक पूर्ण वर्ग है। यह ((x+3)2 ) के बराबर है। / \(x^2+6x+9\) is a perfect square. It equals ((x+3)2 ).
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कौन सा मान \(x^2+x-6=0\) का हल है?
Which value is a solution of \(x^2+x-6=0\)?
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A (1)
B (2)
C (4)
D (6)
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Explanation
Simple Explanation
\(2^2+2-6=0\) है। इसलिए (x=2) इस समीकरण का हल है। / Since \(2^2+2-6=0\), (x=2) is a solution of the equation.
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यदि किसी समीकरण की घात (2) है और वह (x) में है तो उसे क्या कहते हैं?
If an equation in (x) has degree (2), what is it called?
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A रैखिक समीकरण / Linear equation
B द्विघात समीकरण / Quadratic equation
C घन समीकरण / Cubic equation
D स्थिर समीकरण / Constant equation
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Correct Answer
B. द्विघात समीकरण / Quadratic equation
Explanation
Simple Explanation
घात (2) वाले समीकरण को द्विघात समीकरण कहते हैं। नाम याद रखने के लिए द्वि का अर्थ (2) समझें। / An equation of degree (2) is called a quadratic equation. Remember that quadratic means degree (2).
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निम्न में से किसमें \(x^2\) पद मौजूद है?
Which of the following contains the \(x^2\) term?
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A (5x+2=0)
B (7x-9=0)
C \(x^2-2=0\)
D (3x+4=7)
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Correct Answer
C. \(x^2-2=0\)
Explanation
Simple Explanation
द्विघात समीकरण के लिए \(x^2\) पद आवश्यक है। विकल्प (C) में यह पद है। / The \(x^2\) term is necessary for a quadratic equation. Option (C) has this term.
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समीकरण \(2x^2+0x-7=0\) में रैखिक पद क्या है?
What is the linear term in \(2x^2+0x-7=0\)?
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A \(2x^2\)
B (0x)
C \(-7\)
D (2x)
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Explanation
Simple Explanation
रैखिक पद (x) वाला पद होता है। यहां वह (0x) है। / The linear term is the term containing (x). Here it is (0x).
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कौन सा समीकरण \(x^2+2x+1=0\) के बराबर है?
Which equation is equivalent to \(x^2+2x+1=0\)?
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#perfect square
#equivalent form
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A \((x+1)^2=0\)
B \((x-1)^2=0\)
C \((x+2)^2=0\)
D \((x-2)^2=0\)
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Correct Answer
A. \((x+1)^2=0\)
Explanation
Simple Explanation
((x+1)2 =x-2 +2x+1) होता है। पूर्ण वर्ग पहचानना तेजी से हल कराने में मदद करता है। / ((x+1)2 =x-2 +2x+1). Recognising perfect squares helps solve faster.
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\(x^2-16=0\) को गुणनखंड रूप में कैसे लिखेंगे?
How do we write \(x^2-16=0\) in factor form?
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A \((x-4)(x+4)=0\)
B \((x-8)(x+2)=0\)
C \((x+4)(x+4)=0\)
D \((x-4)(x-4)=0\)
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Correct Answer
A. \((x-4)(x+4)=0\)
Explanation
Simple Explanation
\(x^2-16\) वर्गों का अंतर है। इसलिए यह ((x-4)(x+4)) बनता है। / \(x^2-16\) is a difference of squares. Hence it becomes ((x-4)(x+4)).
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यदि (x=1) है तो \(x^2+2x-3=0\) में बायां पक्ष कितना होगा?
If (x=1), what is the left side of \(x^2+2x-3=0\)?
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A (0)
B (1)
C (2)
D \(-3\)
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Explanation
Simple Explanation
रखने पर \(1^2+2\cdot1-3=0\) मिलता है। इसलिए (1) एक हल है। / Substituting gives \(1^2+2\cdot1-3=0\). So (1) is a solution.
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समीकरण \(7x^2-14=0\) में (a), (b), (c) कौन से हैं?
What are (a), (b), (c) in \(7x^2-14=0\)?
#quadratic equations
#coefficients
#missing term
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A (7,0,-14)
B (7,-14,0)
C (0,7,-14)
D \(-14,0,7\)
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Correct Answer
A. (7,0,-14)
Explanation
Simple Explanation
इसे \(7x^2+0x-14=0\) लिखें। इससे (a=7), (b=0), (c=-14) मिलते हैं। / Write it as \(7x^2+0x-14=0\). Then (a=7), (b=0), (c=-14).
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कौन सा समीकरण (x) में द्विघात है लेकिन (y) में नहीं?
Which equation is quadratic in (x) but not in (y)?
#quadratic equations
#variable
#degree
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A \(x^2+5x+6=0\)
B \(y^2+2y+1=0\)
C (x+5=0)
D (y+3=0)
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Correct Answer
A. \(x^2+5x+6=0\)
Explanation
Simple Explanation
विकल्प (A) में चर (x) की घात (2) है। इसलिए यह (x) में द्विघात है। / In option (A), the variable (x) has degree (2). So it is quadratic in (x).
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(3x(x-2)=0) का मानक रूप क्या है?
What is the standard form of (3x(x-2)=0)?
#quadratic equations
#expansion
#standard form
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A \(3x^2-6x=0\)
B \(3x^2+6x=0\)
C \(x^2-6x=0\)
D (3x-6=0)
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Correct Answer
A. \(3x^2-6x=0\)
Explanation
Simple Explanation
(3x) को दोनों पदों से गुणा करने पर \(3x^2-6x=0\) मिलता है। चिन्ह पर ध्यान दें। / Multiplying (3x) by both terms gives \(3x^2-6x=0\). Watch the sign.
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यदि (p(x)=x-2 -1) है तो (p(1)) कितना है?
If (p(x)=x-2 -1), what is (p(1))?
#quadratic equations
#polynomial value
#zero
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A (0)
B (1)
C \(-1\)
D (2)
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Explanation
Simple Explanation
(p(1)=12 -1=0) है। जब (p(a)=0) हो तो (a) शून्यक कहलाता है। / (p(1)=12 -1=0). When (p(a)=0), (a) is called a zero.
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कौन सा विकल्प \(2x^2+3x+1=0\) में स्थिर पद है?
Which option is the constant term in \(2x^2+3x+1=0\)?
#quadratic equations
#constant term
#term identification
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A \(2x^2\)
B (3x)
C (1)
D (0)
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Explanation
Simple Explanation
स्थिर पद में (x) नहीं होता। इसलिए (1) स्थिर पद है। / The constant term does not contain (x). Hence (1) is the constant term.
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समीकरण \(x^2+10x=0\) में कौन सा पद अनुपस्थित है?
Which term is absent in \(x^2+10x=0\)?
#quadratic equations
#missing term
#constant
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A द्विघात पद / Quadratic term
B रैखिक पद / Linear term
C स्थिर पद / Constant term
D सभी पद / All terms
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Correct Answer
C. स्थिर पद / Constant term
Explanation
Simple Explanation
इसे \(x^2+10x+0=0\) माना जाता है। इसलिए स्थिर पद अनुपस्थित है। / It is treated as \(x^2+10x+0=0\). So the constant term is absent.
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कौन सा समीकरण \(x^2+5=0\) की तरह शुद्ध द्विघात है?
Which equation is a pure quadratic like \(x^2+5=0\)?
#quadratic equations
#pure quadratic
#recognition
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A \(x^2-9=0\)
B \(x^2+3x+2=0\)
C (x+9=0)
D \(x^3-9=0\)
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Correct Answer
A. \(x^2-9=0\)
Explanation
Simple Explanation
शुद्ध द्विघात में (x) वाला रैखिक पद नहीं होता। \(x^2-9=0\) ऐसा ही है। / A pure quadratic has no linear (x) term. \(x^2-9=0\) is of that type.
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\(x^2+4x+4=0\) में (x=-2) रखने पर क्या होगा?
What happens when (x=-2) is put in \(x^2+4x+4=0\)?
#quadratic equations
#negative root
#verification
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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 (4) होता है / The left side is (4)
D बायां पक्ष (-4) होता है / The left side is (-4)
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Correct Answer
A. समीकरण संतुष्ट होता है / The equation is satisfied
Explanation
Simple Explanation
((-2)2 +4(-2)+4=0) है। अतः (x=-2) हल है। / ((-2)2 +4(-2)+4=0). Hence (x=-2) is a solution.
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कौन सा रूप \(ax^2+bx+c=0\) में (a=2), (b=-5), (c=3) को दर्शाता है?
Which form represents (a=2), (b=-5), (c=3) in \(ax^2+bx+c=0\)?
#quadratic equations
#forming equation
#coefficients
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A \(2x^2-5x+3=0\)
B \(2x^2+5x+3=0\)
C \(2x^2-3x+5=0\)
D \(5x^2-2x+3=0\)
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Correct Answer
A. \(2x^2-5x+3=0\)
Explanation
Simple Explanation
दिए गए मान सीधे मानक रूप में रखने पर \(2x^2-5x+3=0\) मिलता है। (b) का चिन्ह ध्यान रखें। / Putting the given values in standard form gives \(2x^2-5x+3=0\). Keep the sign of (b) carefully.
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यदि (a=1), (b=0), (c=-25) हैं तो समीकरण क्या होगा?
If (a=1), (b=0), (c=-25), what is the equation?
#quadratic equations
#forming equation
#standard form
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A \(x^2-25=0\)
B \(x^2+25=0\)
C \(x^2+25x=0\)
D \(25x^2-1=0\)
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Correct Answer
A. \(x^2-25=0\)
Explanation
Simple Explanation
\(ax^2+bx+c=0\) में रखने पर \(x^2+0x-25=0\) मिलता है। इसे \(x^2-25=0\) लिखते हैं। / Substituting in \(ax^2+bx+c=0\) gives \(x^2+0x-25=0\). This is written as \(x^2-25=0\).
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कौन सा समीकरण मानक रूप में लाने पर \(x^2-7x+10=0\) बनता है?
Which equation becomes \(x^2-7x+10=0\) after writing in standard form?
#quadratic equations
#standard form
#reverse thinking
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A \(x^2-7x=-10\)
B \(x^2-7x=10\)
C \(x^2+7x=-10\)
D \(x^2+7x=10\)
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Correct Answer
A. \(x^2-7x=-10\)
Explanation
Simple Explanation
\(x^2-7x=-10\) में (-10) को बाईं ओर लाने पर (+10) बनता है। इसलिए मानक रूप \(x^2-7x+10=0\) है। / In \(x^2-7x=-10\), moving (-10) to the left gives (+10). So the standard form is \(x^2-7x+10=0\).
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\(x^2+3x+2=0\) में कितने अधिकतम वास्तविक हल हो सकते हैं?
What is the maximum number of real solutions possible for \(x^2+3x+2=0\)?
#quadratic equations
#number of solutions
#degree
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A (1)
B (2)
C (3)
D (0)
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Explanation
Simple Explanation
द्विघात समीकरण के अधिकतम (2) वास्तविक हल हो सकते हैं। आसान प्रश्न में घात से अधिकतम हल का संकेत मिलता है। / A quadratic equation can have at most (2) real solutions. In easy questions, degree indicates the maximum possible solutions.
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समीकरण \(4x^2+4x+1=0\) में (a+b+c) का मान क्या है?
What is the value of (a+b+c) for \(4x^2+4x+1=0\)?
#quadratic equations
#coefficients
#sum
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A (7)
B (8)
C (9)
D (1)
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Explanation
Simple Explanation
यहां (a=4), (b=4), (c=1) हैं। इसलिए (a+b+c=9) है। / Here (a=4), (b=4), (c=1). Therefore (a+b+c=9).
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समीकरण \(2x^2-3x-5=0\) में (a-b+c) का मान क्या है?
What is the value of (a-b+c) for \(2x^2-3x-5=0\)?
#quadratic equations
#coefficients
#expression value
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A (0)
B (2)
C \(-6\)
D (10)
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Explanation
Simple Explanation
यहां (a=2), (b=-3), (c=-5) हैं। इसलिए (a-b+c=2-(-3)-5=0) है। / Here (a=2), (b=-3), (c=-5). Thus (a-b+c=2-(-3)-5=0).
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\(5x^2+2x-1=0\) की घात क्या है?
What is the degree of \(5x^2+2x-1=0\)?
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#degree
#identification
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A (0)
B (1)
C (2)
D (5)
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Explanation
Simple Explanation
सबसे बड़ी घात (2) है। इसलिए समीकरण द्विघात है। / The highest power is (2). Therefore the equation is quadratic.
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कौन सा विकल्प \(x^2-2x-15=0\) का गुणनखंड रूप है?
Which option is the factor form of \(x^2-2x-15=0\)?
#quadratic equations
#factor form
#verification
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A \((x-5)(x+3)=0\)
B \((x+5)(x-3)=0\)
C \((x-5)(x-3)=0\)
D \((x+5)(x+3)=0\)
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Correct Answer
A. \((x-5)(x+3)=0\)
Explanation
Simple Explanation
((x-5)(x+3)) फैलाने पर \(x^2-2x-15\) मिलता है। गुणनखंड जांचने के लिए विस्तार करें। / Expanding ((x-5)(x+3)) gives \(x^2-2x-15\). To check factors, expand them.
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यदि एक आयत की लंबाई (x+3) और चौड़ाई (x) है तथा क्षेत्रफल (10) है तो समीकरण क्या बनेगा?
If a rectangle has length (x+3) and width (x), and area (10), what equation is formed?
#quadratic equations
#word problem
#area
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A (x(x+3)=10)
B (x+3=10)
C (2x+3=10)
D \(x^2=3\)
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Correct Answer
A. (x(x+3)=10)
Explanation
Simple Explanation
क्षेत्रफल लंबाई और चौड़ाई का गुणनफल होता है। इसलिए समीकरण (x(x+3)=10) बनेगा। / Area is the product of length and width. So the equation is (x(x+3)=10).
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दो लगातार धन पूर्णांकों का गुणनफल (30) है। यदि छोटा पूर्णांक (x) है तो समीकरण क्या होगा?
The product of two consecutive positive integers is (30). If the smaller integer is (x), what is the equation?
#quadratic equations
#word problem
#consecutive integers
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A (x(x+1)=30)
B (x+x+1=30)
C (x(x-1)=30)
D (2x=30)
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Correct Answer
A. (x(x+1)=30)
Explanation
Simple Explanation
लगातार अगला पूर्णांक (x+1) होगा। गुणनफल (30) है इसलिए (x(x+1)=30) बनेगा। / The next consecutive integer is (x+1). Since the product is (30), the equation is (x(x+1)=30).
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किस विकल्प में सामान्य गलती है जब \(x^2=5x-6\) को मानक रूप में बदला जाता है?
Which option shows the common mistake while converting \(x^2=5x-6\) to standard form?
#quadratic equations
#common mistake
#standard form
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A \(x^2-5x+6=0\)
B \(x^2-5x-6=0\)
C \(x^2+0x=5x-6\)
D \(x^2=5x-6\)
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Correct Answer
B. \(x^2-5x-6=0\)
Explanation
Simple Explanation
सही रूप \(x^2-5x+6=0\) है। विकल्प (B) में (-6) का चिन्ह नहीं बदला गया। / The correct form is \(x^2-5x+6=0\). In option (B), the sign of (-6) was not changed.
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कौन सा समीकरण (x=0) को हल के रूप में रखता है?
Which equation has (x=0) as a solution?
#quadratic equations
#zero solution
#substitution
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A \(x^2+5x=0\)
B \(x^2+5=0\)
C \(x^2-5=0\)
D \(x^2+5x+1=0\)
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Correct Answer
A. \(x^2+5x=0\)
Explanation
Simple Explanation
(x=0) रखने पर विकल्प (A) में (0=0) मिलता है। हल जांचने का सबसे सरल तरीका प्रत्यक्ष प्रतिस्थापन है। / Putting (x=0) in option (A) gives (0=0). Direct substitution is the simplest way to check a solution.
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यदि \(x^2+kx+12=0\) एक द्विघात समीकरण है तो (k) किस पद का गुणांक है?
If \(x^2+kx+12=0\) is a quadratic equation, then (k) is the coefficient of which term?
#quadratic equations
#coefficient
#standard form
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A \(x^2\) पद / \(x^2\) term
B (x) पद / (x) term
C स्थिर पद (12) / Constant term (12)
D शून्य पद (0) / Zero term (0)
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Correct Answer
B. (x) पद / (x) term
Explanation
Simple Explanation
मानक रूप \(ax^2+bx+c=0\) में (x) का गुणांक (b) होता है। यहां (kx) में (k) (x) का गुणांक है। / In \(ax^2+bx+c=0\), (b) is the coefficient of (x). Here in (kx), (k) is the coefficient of (x).
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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?
#quadratic equations
#condition
#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 \(2x^2=5x+3\)?
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#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 \(x^2-25=0\)?
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#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
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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)?
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#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)?
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#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 \(x^2+12x+36=0\)?
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#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?
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#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 \(x^2-3x-10=0\)?
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#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?
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#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 \(9x^2+0x+2=0\)?
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#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 \(x^2+5x-14=0\)?
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#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)?
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#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
#constant
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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
#negative root
#verification
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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
#forming equation
#coefficients
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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)
Explanation opens after your attempt
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?
#quadratic equations
#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?
#quadratic equations
#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?
#quadratic equations
#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
#true false
#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 \(x^2=6x+5\)
Explanation opens after your attempt
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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द्विघात समीकरण का सामान्य रूप कौन-सा है?
What is the general form of a quadratic equation?
#quadratic-equations
#introduction
#standard-form
#easy
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A \(ax^2+bx+c=0,\ a\neq 0\)
B (ax+b=0)
C \(ax^3+bx+c=0\)
D \(\frac{a}{x}+b=0\)
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Correct Answer
A. \(ax^2+bx+c=0,\ a\neq 0\)
Explanation
Simple Explanation
द्विघात समीकरण में (x) की सबसे बड़ी घात (2) होती है और \(a\neq 0\) होता है। परीक्षा में पहले मानक रूप पहचानें। / A quadratic equation has highest power (2) of (x) and \(a\neq 0\). In exams identify the standard form first.
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निम्न में से कौन-सा द्विघात समीकरण है?
Which of the following is a quadratic equation?
#quadratic-equations
#identify-equation
#class-10
#easy
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A \(x^2+3x+2=0\)
B (2x+5=0)
C \(x^3-x=0\)
D \(\frac{1}{x}+2=0\)
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Correct Answer
A. \(x^2+3x+2=0\)
Explanation
Simple Explanation
\(x^2+3x+2=0\) में सबसे बड़ी घात (2) है। विकल्प चुनते समय घात को सबसे पहले देखें। / In \(x^2+3x+2=0\), the highest power is (2). Check the power first while choosing an option.
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समीकरण \(7x^2-4x+9=0\) की घात क्या है?
What is the degree of the equation \(7x^2-4x+9=0\)?
#quadratic-equations
#degree
#easy
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A (1)
B (2)
C (3)
D (0)
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Explanation
Simple Explanation
इस समीकरण में (x) की सबसे बड़ी घात (2) है। घात हमेशा चर की सबसे बड़ी शक्ति से तय होती है। / The highest power of (x) in this equation is (2). Degree is decided by the greatest power of the variable.
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समीकरण \(x^2-5x+6=0\) में (a,b,c) के मान क्या हैं?
What are the values of (a,b,c) in \(x^2-5x+6=0\)?
#quadratic-equations
#coefficients
#standard-form
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A (a=1,\ b=-5,\ c=6)
B (a=1,\ b=5,\ c=6)
C (a=-1,\ b=-5,\ c=6)
D (a=6,\ b=-5,\ c=1)
Explanation opens after your attempt
Correct Answer
A. (a=1,\ b=-5,\ c=6)
Explanation
Simple Explanation
मानक रूप से मिलाने पर (a=1,\ b=-5,\ c=6) मिलता है। चिन्हों पर विशेष ध्यान रखें। / Comparing with standard form gives (a=1,\ b=-5,\ c=6). Pay special attention to signs.
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द्विघात समीकरण \(ax^2+bx+c=0\) में (a) के लिए आवश्यक शर्त क्या है?
What is the required condition for (a) in \(ax^2+bx+c=0\)?
#quadratic-equations
#condition-on-a
#easy
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A (a=0)
B (a<0)
C \(a\neq 0\)
D (a=1)
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Correct Answer
C. \(a\neq 0\)
Explanation
Simple Explanation
यदि (a=0) हो जाए तो \(x^2\) पद नहीं बचेगा। इसलिए द्विघात होने के लिए \(a\neq 0\) जरूरी है। / If (a=0), the \(x^2\) term disappears. So \(a\neq 0\) is necessary for a quadratic equation.
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क्या (x=2) समीकरण \(x^2-4=0\) का मूल है?
Is (x=2) a root of \(x^2-4=0\)?
#quadratic-equations
#root-checking
#easy
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A हाँ / Yes
B नहीं / No
C केवल (x=-2) मूल है / Only (x=-2) is a root
D निर्धारित नहीं हो सकता / Cannot be determined
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Correct Answer
A. हाँ / Yes
Explanation
Simple Explanation
(x=2) रखने पर \(2^2-4=0\) मिलता है। मूल जांचने के लिए मान रखकर परिणाम (0) देखें। / Putting (x=2) gives \(2^2-4=0\). To check a root, substitute the value and see if the result is (0).
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किसी संख्या (x) के वर्ग में उसके (3) गुने को जोड़ने पर (10) मिलता है। सही समीकरण कौन-सा है?
The square of a number (x) plus (3) times the number is (10). Which equation is correct?
#quadratic-equations
#word-problem
#formation
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A \(x+3x^2=10\)
B \(x^2+3x=10\)
C (2x+3=10)
D \(x^2-3x=10\)
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Correct Answer
B. \(x^2+3x=10\)
Explanation
Simple Explanation
वर्ग का अर्थ \(x^2\) और (3) गुना का अर्थ (3x) है। शब्द प्रश्न में वाक्य को धीरे-धीरे समीकरण में बदलें। / Square means \(x^2\) and (3) times means (3x). In word problems, convert the sentence slowly into an equation.
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समीकरण (3x+2=0) द्विघात क्यों नहीं है?
Why is (3x+2=0) not a quadratic equation?
#quadratic-equations
#non-example
#linear-equation
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A क्योंकि इसमें \(x^2\) पद है / Because it has an \(x^2\) term
B क्योंकि इसमें स्थिर पद है / Because it has a constant term
C क्योंकि इसमें (x) नहीं है / Because it has no (x)
D क्योंकि सबसे बड़ी घात (1) है / Because the highest power is (1)
Explanation opens after your attempt
Correct Answer
D. क्योंकि सबसे बड़ी घात (1) है / Because the highest power is (1)
Explanation
Simple Explanation
(3x+2=0) में (x) की सबसे बड़ी घात (1) है। द्विघात के लिए सबसे बड़ी घात (2) होनी चाहिए। / In (3x+2=0), the highest power of (x) is (1). A quadratic equation must have highest power (2).
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एक द्विघात समीकरण के अधिकतम कितने मूल हो सकते हैं?
What is the maximum number of roots of a quadratic equation?
#quadratic-equations
#roots
#max-roots
#easy
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A (1)
B (2)
C (3)
D (4)
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Explanation
Simple Explanation
द्विघात समीकरण की घात (2) होती है इसलिए अधिकतम (2) मूल हो सकते हैं। घात और अधिकतम मूल की संख्या को जोड़कर याद रखें। / A quadratic equation has degree (2), so it can have at most (2) roots. Remember degree and maximum number of roots together.
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समीकरण \(5x^2-2x+1=0\) में \(x^2\) का गुणांक क्या है?
What is the coefficient of \(x^2\) in \(5x^2-2x+1=0\)?
#quadratic-equations
#coefficient-a
#easy
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A (5)
B (2)
C (1)
D (-2)
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Explanation
Simple Explanation
\(x^2\) के साथ लगा गुणांक (5) है। गुणांक लिखते समय केवल पद के साथ लगा संख्यात्मक भाग लें। / The coefficient attached to \(x^2\) is (5). While writing a coefficient, take the numerical part attached to the term.
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समीकरण \(4=3x-x^2\) का मानक रूप क्या है?
What is the standard form of \(4=3x-x^2\)?
#quadratic-equations
#standard-form
#transposition
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A \(x^2-3x+4=0\)
B \(x^2+3x+4=0\)
C \(x^2-3x-4=0\)
D \(x^2+3x-4=0\)
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Correct Answer
A. \(x^2-3x+4=0\)
Explanation
Simple Explanation
सभी पद एक तरफ लाने पर \(x^2-3x+4=0\) मिलता है। मानक रूप में दायां पक्ष (0) रखें। / Bringing all terms to one side gives \(x^2-3x+4=0\). In standard form, keep the right side as (0).
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समीकरण \(x^2-7=0\) में रैखिक पद कौन-सा है?
What is the linear term in \(x^2-7=0\)?
#quadratic-equations
#linear-term
#missing-term
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A \(x^2\)
B (-7)
C (0x)
D (7x)
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Explanation
Simple Explanation
इसमें (x) वाला पद नहीं है इसलिए रैखिक पद (0x) माना जाता है। अनुपस्थित पद का गुणांक (0) होता है। / There is no (x) term, so the linear term is considered (0x). A missing term has coefficient (0).
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समीकरण \(2x^2+3x-8=0\) में स्थिर पद कौन-सा है?
What is the constant term in \(2x^2+3x-8=0\)?
#quadratic-equations
#constant-term
#easy
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A (2)
B (3)
C (8)
D (-8)
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Explanation
Simple Explanation
जिस पद में (x) नहीं होता वह स्थिर पद होता है। यहाँ स्थिर पद (-8) है। / The term without (x) is the constant term. Here the constant term is (-8).
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समीकरण \(6x^2-x+5=0\) में द्विघात पद कौन-सा है?
Which is the quadratic term in \(6x^2-x+5=0\)?
#quadratic-equations
#quadratic-term
#easy
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A (-x)
B \(6x^2\)
C (5)
D (x)
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Correct Answer
B. \(6x^2\)
Explanation
Simple Explanation
जिस पद में \(x^2\) होता है वह द्विघात पद है। यहाँ द्विघात पद \(6x^2\) है। / The term containing \(x^2\) is the quadratic term. Here the quadratic term is \(6x^2\).
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निम्न में से शुद्ध द्विघात समीकरण कौन-सा है?
Which of the following is a pure quadratic equation?
#quadratic-equations
#pure-quadratic
#easy
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A \(x^2+2x+1=0\)
B (3x+9=0)
C \(4x^2-9=0\)
D \(x^3-1=0\)
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Correct Answer
C. \(4x^2-9=0\)
Explanation
Simple Explanation
शुद्ध द्विघात में (x) वाला पद नहीं होता है। \(4x^2-9=0\) में रैखिक पद अनुपस्थित है। / A pure quadratic equation has no (x) term. In \(4x^2-9=0\), the linear term is absent.
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निम्न में से मोनिक द्विघात समीकरण कौन-सा है?
Which of the following is a monic quadratic equation?
#quadratic-equations
#monic-quadratic
#easy
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A \(x^2+5x+6=0\)
B \(2x^2+x+1=0\)
C \(-3x^2+x=0\)
D \(4x^2-1=0\)
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Correct Answer
A. \(x^2+5x+6=0\)
Explanation
Simple Explanation
मोनिक द्विघात में \(x^2\) का गुणांक (1) होता है। इसलिए \(x^2+5x+6=0\) सही है। / In a monic quadratic equation, the coefficient of \(x^2\) is (1). So \(x^2+5x+6=0\) is correct.
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क्या (x=0) समीकरण \(x^2+5x=0\) का मूल है?
Is (x=0) a root of \(x^2+5x=0\)?
#quadratic-equations
#root-verification
#easy
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A हाँ / Yes
B नहीं / No
C केवल (x=5) मूल है / Only (x=5) is a root
D केवल (x=-5) मूल है / Only (x=-5) is a root
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Correct Answer
A. हाँ / Yes
Explanation
Simple Explanation
(x=0) रखने पर \(0^2+5\cdot0=0\) मिलता है। मूल जांचने में प्रतिस्थापन सबसे आसान तरीका है। / Putting (x=0) gives \(0^2+5\cdot0=0\). Substitution is the easiest way to check a root.
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समीकरण ((m-2 )x-2 +3x+1=0) द्विघात कब होगा?
When will ((m-2 )x-2 +3x+1=0) be quadratic?
#quadratic-equations
#parameter
#condition
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A (m=2)
B \(m\neq 2\)
C (m=0)
D (m=1)
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Correct Answer
B. \(m\neq 2\)
Explanation
Simple Explanation
द्विघात होने के लिए \(x^2\) का गुणांक (0) नहीं होना चाहिए। इसलिए \(m-2\neq 0\) यानी \(m\neq 2\)। / For the equation to be quadratic, the coefficient of \(x^2\) must not be (0). Thus \(m-2\neq 0\), so \(m\neq 2\).
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द्विघात समीकरण \(ax^2+bx+c=0\) का विवेचक क्या होता है?
What is the discriminant of \(ax^2+bx+c=0\)?
#quadratic-equations
#discriminant
#introduction
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A \(a^2-4bc\)
B \(b^2+4ac\)
C \(b^2-4ac\)
D \(c^2-4ab\)
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Correct Answer
C. \(b^2-4ac\)
Explanation
Simple Explanation
विवेचक \(D=b^2-4ac\) होता है। इसे याद रखने से मूलों की प्रकृति समझना आसान होता है। / The discriminant is \(D=b^2-4ac\). Remembering it helps in understanding the nature of roots.
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यदि किसी द्विघात समीकरण का विवेचक (D>0) है तो मूल कैसे होंगे?
If the discriminant (D>0) for a quadratic equation, how will the roots be?
#quadratic-equations
#discriminant
#roots
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A दो भिन्न वास्तविक मूल / Two distinct real roots
B दो समान वास्तविक मूल / Two equal real roots
C कोई वास्तविक मूल नहीं / No real roots
D केवल एक मूल / Only one root
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Correct Answer
A. दो भिन्न वास्तविक मूल / Two distinct real roots
Explanation
Simple Explanation
(D>0) होने पर दो भिन्न वास्तविक मूल मिलते हैं। विवेचक का चिन्ह मूलों की प्रकृति बताता है। / When (D>0), the equation has two distinct real roots. The sign of the discriminant tells the nature of roots.
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यदि किसी द्विघात समीकरण का विवेचक (D=0) है तो मूल कैसे होंगे?
If the discriminant (D=0) for a quadratic equation, how will the roots be?
#quadratic-equations
#discriminant
#equal-roots
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A दो भिन्न वास्तविक मूल / Two distinct real roots
B दो समान वास्तविक मूल / Two equal real roots
C कोई वास्तविक मूल नहीं / No real roots
D तीन वास्तविक मूल / Three real roots
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Correct Answer
B. दो समान वास्तविक मूल / Two equal real roots
Explanation
Simple Explanation
(D=0) होने पर दोनों वास्तविक मूल समान होते हैं। ऐसे प्रश्नों में (D) की तुलना (0) से करें। / When (D=0), both real roots are equal. In such questions, compare (D) with (0).
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यदि किसी द्विघात समीकरण का विवेचक (D<0) है तो वास्तविक मूलों के बारे में क्या सही है?
If the discriminant (D<0), what is true about real roots?
#quadratic-equations
#discriminant
#no-real-roots
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A दो समान वास्तविक मूल होते हैं / It has two equal real roots
B दो भिन्न वास्तविक मूल होते हैं / It has two distinct real roots
C कोई वास्तविक मूल नहीं होता / It has no real roots
D एक वास्तविक मूल होता है / It has one real root
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Correct Answer
C. कोई वास्तविक मूल नहीं होता / It has no real roots
Explanation
Simple Explanation
(D<0) होने पर वास्तविक मूल नहीं होते। विवेचक नकारात्मक हो तो वास्तविक संख्या रेखा पर मूल नहीं मिलते। / When (D<0), there are no real roots. A negative discriminant gives no roots on the real number line.
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समीकरण \(-x^2+4x-1=0\) में (a,b,c) के सही मान कौन-से हैं?
Which are the correct values of (a,b,c) in \(-x^2+4x-1=0\)?
#quadratic-equations
#coefficients
#signs
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A (a=-1,\ b=4,\ c=-1)
B (a=1,\ b=4,\ c=-1)
C (a=-1,\ b=-4,\ c=-1)
D (a=4,\ b=-1,\ c=-1)
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Correct Answer
A. (a=-1,\ b=4,\ c=-1)
Explanation
Simple Explanation
\(x^2\) का गुणांक (-1), (x) का गुणांक (4) और स्थिर पद (-1) है। ऋण चिन्ह को कभी न छोड़ें। / The coefficient of \(x^2\) is (-1), the coefficient of (x) is (4), and the constant term is (-1). Never ignore the negative sign.
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समीकरण \(0x^2+2x+3=0\) द्विघात क्यों नहीं है?
Why is \(0x^2+2x+3=0\) not quadratic?
#quadratic-equations
#non-quadratic
#a-zero
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A क्योंकि (c=3) है / Because (c=3)
B क्योंकि \(x^2\) का गुणांक (0) है / Because the coefficient of \(x^2\) is (0)
C क्योंकि (x) का गुणांक (2) है / Because the coefficient of (x) is (2)
D क्योंकि इसमें स्थिर पद है / Because it has a constant term
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Correct Answer
B. क्योंकि \(x^2\) का गुणांक (0) है / Because the coefficient of \(x^2\) is (0)
Explanation
Simple Explanation
यहाँ \(x^2\) का गुणांक (0) है इसलिए \(x^2\) पद समाप्त हो जाता है। द्विघात के लिए \(a\neq 0\) जरूरी है। / Here the coefficient of \(x^2\) is (0), so the \(x^2\) term disappears. For a quadratic equation, \(a\neq 0\) is necessary.
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((x+1)(x+2)=0) को फैलाने पर कौन-सा समीकरण मिलेगा?
Which equation is obtained by expanding ((x+1)(x+2)=0)?
#quadratic-equations
#expansion
#standard-form
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A \(x^2+3x+2=0\)
B \(x^2+2x+3=0\)
C \(x^2+x+2=0\)
D \(x^2+3x-2=0\)
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Correct Answer
A. \(x^2+3x+2=0\)
Explanation
Simple Explanation
((x+1)(x+2)=x-2 +3x+2) होता है। गुणा करते समय मध्य पदों को जोड़ना न भूलें। / ((x+1)(x+2)=x-2 +3x+2). Do not forget to add the middle terms while multiplying.
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समीकरण \(x^2=7\) का मानक रूप कौन-सा है?
What is the standard form of \(x^2=7\)?
#quadratic-equations
#standard-form
#easy
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A \(x^2+7=0\)
B \(7x^2=0\)
C \(x^2-7x=0\)
D \(x^2-7=0\)
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Correct Answer
D. \(x^2-7=0\)
Explanation
Simple Explanation
(7) को बाईं ओर लाने पर \(x^2-7=0\) मिलता है। मानक रूप में सभी पद एक तरफ होते हैं। / Bringing (7) to the left gives \(x^2-7=0\). In standard form, all terms are on one side.
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समीकरण \(x^2-1=0\) के मूल कौन-से हैं?
What are the roots of \(x^2-1=0\)?
#quadratic-equations
#simple-roots
#difference-of-squares
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A (0,1)
B (-1,1)
C (1,2)
D (-2,2)
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Explanation
Simple Explanation
(x-2 -1=(x-1)(x+1)) होता है। इसलिए मूल (1) और (-1) हैं। / (x-2 -1=(x-1)(x+1)). Therefore the roots are (1) and (-1).
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समीकरण \(x^2=9\) के मूल कौन-से हैं?
What are the roots of \(x^2=9\)?
#quadratic-equations
#square-roots
#roots
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A (0,9)
B (3,9)
C (-3,3)
D (-9,9)
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Explanation
Simple Explanation
\(x^2=9\) से \(x=\pm3\) मिलता है। वर्गमूल लेते समय धन और ऋण दोनों मान लें। / From \(x^2=9\), we get \(x=\pm3\). While taking square roots, take both positive and negative values.
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जिन मूलों में (0) और (-3) हों उनके लिए सही द्विघात समीकरण कौन-सा है?
Which quadratic equation has roots (0) and (-3)?
#quadratic-equations
#forming-equation
#roots
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A \(x^2+3x=0\)
B \(x^2-3x=0\)
C \(x^2+3=0\)
D \(x^2-3=0\)
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Correct Answer
A. \(x^2+3x=0\)
Explanation
Simple Explanation
मूल (0) और (-3) होने पर गुणनखंड (x) और (x+3) होंगे। इसलिए समीकरण (x(x+3)=0) यानी \(x^2+3x=0\) है। / For roots (0) and (-3), the factors are (x) and (x+3). So the equation is (x(x+3)=0), that is \(x^2+3x=0\).
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यदि \(\alpha\) समीकरण (p(x)=0) का मूल है तो कौन-सा कथन सही है?
If \(\alpha\) is a root of (p(x)=0), which statement is correct?
#quadratic-equations
#root-definition
#easy
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A (p\(\alpha\)>0)
B (p\(\alpha\)=0)
C (p\(\alpha\)<0)
D (p(x)=\alpha)
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Correct Answer
B. (p\(\alpha\)=0)
Explanation
Simple Explanation
मूल वह मान है जिसे रखने पर समीकरण का बायां पक्ष (0) हो जाता है। इसलिए (p\(\alpha\)=0) सही है। / A root is a value that makes the left side of the equation (0). Therefore (p\(\alpha\)=0) is correct.
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क्या (x=1) समीकरण \(x^2-x=0\) का मूल है?
Is (x=1) a root of \(x^2-x=0\)?
#quadratic-equations
#root-check
#easy
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A हाँ / Yes
B नहीं / No
C केवल (x=0) मूल है / Only (x=0) is a root
D कोई मूल नहीं है / There is no root
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Correct Answer
A. हाँ / Yes
Explanation
Simple Explanation
(x=1) रखने पर \(1^2-1=0\) मिलता है। मूल की जांच में दिया हुआ मान सीधे रखें। / Putting (x=1) gives \(1^2-1=0\). To check a root, directly substitute the given value.
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व्यंजक (p(x)=x-2 +2x+1) क्या है?
What is the expression (p(x)=x-2 +2x+1)?
#quadratic-equations
#polynomial-vs-equation
#easy
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A रैखिक समीकरण / Linear equation
B द्विघात समीकरण / Quadratic equation
C द्विघात बहुपद / Quadratic polynomial
D घन समीकरण / Cubic equation
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Correct Answer
C. द्विघात बहुपद / Quadratic polynomial
Explanation
Simple Explanation
(p(x)=x-2 +2x+1) एक बहुपद है क्योंकि इसे (0) के बराबर नहीं रखा गया है। (=0) लगाने पर यह समीकरण बनेगा। / (p(x)=x-2 +2x+1) is a polynomial because it is not set equal to (0). It becomes an equation when written as equal to (0).
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समीकरण \(x^2+1=0\) की घात क्या है?
What is the degree of \(x^2+1=0\)?
#quadratic-equations
#degree
#constant-term
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A (1)
B (2)
C (0)
D (4)
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Explanation
Simple Explanation
इसमें (x) की सबसे बड़ी घात (2) है। स्थिर पद घात को नहीं बदलता। / The highest power of (x) is (2). The constant term does not change the degree.
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समीकरण \(2x^2-x+8=0\) में (x) का गुणांक क्या है?
What is the coefficient of (x) in \(2x^2-x+8=0\)?
#quadratic-equations
#coefficient-b
#signs
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A (-1)
B (1)
C (2)
D (8)
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Explanation
Simple Explanation
(-x) का गुणांक (-1) होता है। चिन्ह सहित गुणांक लिखना जरूरी है। / The coefficient of (-x) is (-1). It is necessary to write the coefficient with its sign.
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समीकरण \(x^2+7x=0\) में (c) का मान क्या है?
What is the value of (c) in \(x^2+7x=0\)?
#quadratic-equations
#coefficient-c
#missing-term
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A (1)
B (7)
C \(-7\)
D (0)
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Explanation
Simple Explanation
मानक रूप से मिलाने पर स्थिर पद अनुपस्थित है इसलिए (c=0) है। अनुपस्थित स्थिर पद को (0) मानें। / Comparing with standard form, the constant term is absent, so (c=0). Treat a missing constant term as (0).
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समीकरण (x(x-5)=0) का मानक रूप कौन-सा है?
What is the standard form of (x(x-5)=0)?
#quadratic-equations
#expansion
#standard-form
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A \(x^2+5x=0\)
B \(x^2-5x=0\)
C \(5x^2-x=0\)
D \(x^2-5=0\)
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Correct Answer
B. \(x^2-5x=0\)
Explanation
Simple Explanation
(x(x-5)) को फैलाने पर \(x^2-5x\) मिलता है। कोष्ठक हटाते समय चिन्ह सही रखें। / Expanding (x(x-5)) gives \(x^2-5x\). Keep signs correct while removing brackets.
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समीकरण \(x^2=6x\) का मानक रूप कौन-सा है?
What is the standard form of \(x^2=6x\)?
#quadratic-equations
#standard-form
#transposition
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A \(x^2+6x=0\)
B \(x^2-6x=0\)
C \(6x^2-x=0\)
D \(x^2-6=0\)
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Correct Answer
B. \(x^2-6x=0\)
Explanation
Simple Explanation
(6x) को बाईं ओर लाने पर \(x^2-6x=0\) मिलता है। स्थानांतरण करते समय चिन्ह बदलता है। / Bringing (6x) to the left gives \(x^2-6x=0\). The sign changes during transposition.
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निम्न में से किस समीकरण में चर की सबसे बड़ी घात (2) है?
Which equation has highest power (2) of the variable?
#quadratic-equations
#identify-degree
#easy
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A (5x+1=0)
B \(x^3+1=0\)
C \(3x^2+1=0\)
D \(\sqrt{x}+1=0\)
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Correct Answer
C. \(3x^2+1=0\)
Explanation
Simple Explanation
\(3x^2+1=0\) में सबसे बड़ी घात (2) है। द्विघात पहचानने के लिए चर की घात देखें। / In \(3x^2+1=0\), the highest power is (2). To identify a quadratic equation, look at the power of the variable.
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समीकरण \(\frac{1}{x^2}+x+1=0\) द्विघात समीकरण क्यों नहीं है?
Why is \(\frac{1}{x^2}+x+1=0\) not a quadratic equation?
#quadratic-equations
#non-example
#negative-exponent
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A क्योंकि इसमें (x) की ऋणात्मक घात है / Because it has a negative power of (x)
B क्योंकि इसमें (x) पद है / Because it has an (x) term
C क्योंकि इसमें स्थिर पद है / Because it has a constant term
D क्योंकि इसमें (1) है / Because it has (1)
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Correct Answer
A. क्योंकि इसमें (x) की ऋणात्मक घात है / Because it has a negative power of (x)
Explanation
Simple Explanation
\(\frac{1}{x^2}=x^{-2}\) है जो बहुपद रूप नहीं है। द्विघात समीकरण में चर की ऋणात्मक घात नहीं होती। / \(\frac{1}{x^2}=x^{-2}\), which is not polynomial form. A quadratic equation cannot have a negative power of the variable.
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समीकरण \(\sqrt{x}+x^2=0\) को सामान्य रूप में द्विघात क्यों नहीं माना जाता?
Why is \(\sqrt{x}+x^2=0\) not considered a quadratic equation in the usual form?
#quadratic-equations
#non-example
#radical
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A क्योंकि इसमें \(x^2\) है / Because it has \(x^2\)
B क्योंकि इसमें (0) है / Because it has (0)
C क्योंकि इसमें (x) नहीं है / Because it has no (x)
D क्योंकि इसमें \(\sqrt{x}\) पद है / Because it has a \(\sqrt{x}\) term
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Correct Answer
D. क्योंकि इसमें \(\sqrt{x}\) पद है / Because it has a \(\sqrt{x}\) term
Explanation
Simple Explanation
\(\sqrt{x}\) चर की भिन्न घात दिखाता है इसलिए यह सामान्य द्विघात रूप में नहीं है। द्विघात में केवल \(x^2\), (x) और स्थिर पद होते हैं। / The term \(\sqrt{x}\) shows a fractional power of the variable, so it is not in usual quadratic form. A quadratic equation has only \(x^2\), (x), and constant terms.
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((x+1)2 =0) का मानक रूप क्या है?
What is the standard form of ((x+1)2 =0)?
#quadratic-equations
#identity
#standard-form
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A \(x^2+x+1=0\)
B \(x^2-2x+1=0\)
C \(x^2+2x+1=0\)
D \(x^2+1=0\)
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Correct Answer
C. \(x^2+2x+1=0\)
Explanation
Simple Explanation
((x+1)2 =x-2 +2x+1) होता है। सूत्र ((a+b)2 =a-2 +2ab+b-2 ) याद रखें। / ((x+1)2 =x-2 +2x+1). Remember the formula ((a+b)2 =a-2 +2ab+b-2 ).
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यदि (x=2) समीकरण \(x^2+kx+2=0\) का मूल है तो (k) का मान क्या होगा?
If (x=2) is a root of \(x^2+kx+2=0\), what is the value of (k)?
#quadratic-equations
#parameter
#root-substitution
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A (3)
B (-3)
C (2)
D (-2)
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Explanation
Simple Explanation
(x=2) रखने पर (4+2k+2=0) इसलिए (k=-3) मिलता है। मूल दिया हो तो उसे समीकरण में रखें। / Putting (x=2) gives (4+2k+2=0), so (k=-3). If a root is given, substitute it in the equation.
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यदि (a=3,\ b=0,\ c=-12) हैं तो संबंधित द्विघात समीकरण कौन-सा है?
If (a=3,\ b=0,\ c=-12), which is the corresponding quadratic equation?
#quadratic-equations
#forming-equation
#coefficients
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A \(3x^2-12=0\)
B \(3x^2+12=0\)
C \(3x^2-12x=0\)
D \(12x^2+3=0\)
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Correct Answer
A. \(3x^2-12=0\)
Explanation
Simple Explanation
मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(3x^2+0x-12=0\) मिलता है। इसे सरल करने पर \(3x^2-12=0\) है। / Substituting in \(ax^2+bx+c=0\) gives \(3x^2+0x-12=0\). Simplifying gives \(3x^2-12=0\).
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समीकरण \(2x^2+5=0\) में कौन-सा पद अनुपस्थित है?
Which term is absent in \(2x^2+5=0\)?
#quadratic-equations
#missing-linear-term
#easy
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A द्विघात पद / Quadratic term
B स्थिर पद / Constant term
C रैखिक पद / Linear term
D समीकरण चिह्न / Equation sign
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Correct Answer
C. रैखिक पद / Linear term
Explanation
Simple Explanation
इसमें (x) वाला पद नहीं है इसलिए रैखिक पद अनुपस्थित है। अनुपस्थित पद का गुणांक (0) माना जाता है। / There is no (x) term, so the linear term is absent. The coefficient of a missing term is considered (0).
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निम्न में से (y) में द्विघात समीकरण कौन-सा है?
Which of the following is a quadratic equation in (y)?
#quadratic-equations
#variable-y
#identify
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A \(2y^2-3y+1=0\)
B (2y+1=0)
C \(y^3-y=0\)
D \(\frac{1}{y}+1=0\)
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Correct Answer
A. \(2y^2-3y+1=0\)
Explanation
Simple Explanation
चर (y) की सबसे बड़ी घात (2) है इसलिए यह (y) में द्विघात है। चर कोई भी हो सकता है पर घात (2) होनी चाहिए। / The highest power of (y) is (2), so it is quadratic in (y). The variable may be different, but the degree must be (2).
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मानक रूप \(ax^2+bx+c=0\) में \(x^2\) का गुणांक किससे दर्शाया जाता है?
In the standard form \(ax^2+bx+c=0\), which symbol denotes the coefficient of \(x^2\)?
#quadratic-equations
#standard-form
#coefficient-a
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A (b)
B (a)
C (c)
D (x)
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Explanation
Simple Explanation
मानक रूप में \(x^2\) का गुणांक (a) होता है। यही गुणांक (0) नहीं होना चाहिए। / In standard form, the coefficient of \(x^2\) is (a). This coefficient must not be (0).
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क्या \(x^2+4=0\) एक द्विघात समीकरण है?
Is \(x^2+4=0\) a quadratic equation?
#quadratic-equations
#quadratic-identification
#roots-concept
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A हाँ क्योंकि \(x^2\) का गुणांक (1) है / Yes because the coefficient of \(x^2\) is (1)
B नहीं क्योंकि वास्तविक मूल नहीं हैं / No because it has no real roots
C नहीं क्योंकि (x) पद नहीं है / No because there is no (x) term
D नहीं क्योंकि स्थिर पद है / No because it has a constant term
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Correct Answer
A. हाँ क्योंकि \(x^2\) का गुणांक (1) है / Yes because the coefficient of \(x^2\) is (1)
Explanation
Simple Explanation
\(x^2+4=0\) में \(x^2\) का गुणांक (1) है इसलिए यह द्विघात है। वास्तविक मूल होना द्विघात होने की शर्त नहीं है। / In \(x^2+4=0\), the coefficient of \(x^2\) is (1), so it is quadratic. Having real roots is not a condition for being quadratic.
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मानक द्विघात समीकरण \(ax^2+bx+c=0\) में अधिकतम कितने अलग-अलग पद हो सकते हैं?
In the standard quadratic equation \(ax^2+bx+c=0\), what is the maximum number of different terms?
#quadratic-equations
#terms
#standard-form
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A (1)
B (2)
C (3)
D (4)
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Explanation
Simple Explanation
मानक रूप में \(x^2\) पद, (x) पद और स्थिर पद हो सकते हैं। इसलिए अधिकतम (3) पद होते हैं। / The standard form may contain the \(x^2\) term, the (x) term, and the constant term. So the maximum number of terms is (3).
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क्या \(2x^2=0\) एक द्विघात समीकरण है?
Is \(2x^2=0\) a quadratic equation?
#quadratic-equations
#pure-quadratic
#identify
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A नहीं क्योंकि केवल एक पद है / No because it has only one term
B नहीं क्योंकि (x) पद नहीं है / No because there is no (x) term
C नहीं क्योंकि स्थिर पद नहीं है / No because there is no constant term
D हाँ क्योंकि \(x^2\) का गुणांक (2) है / Yes because the coefficient of \(x^2\) is (2)
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Correct Answer
D. हाँ क्योंकि \(x^2\) का गुणांक (2) है / Yes because the coefficient of \(x^2\) is (2)
Explanation
Simple Explanation
\(2x^2=0\) में \(x^2\) का गुणांक \(2\neq 0\) है। रैखिक और स्थिर पद न होने पर भी यह द्विघात हो सकता है। / In \(2x^2=0\), the coefficient of \(x^2\) is \(2\neq 0\). It can be quadratic even without linear and constant terms.
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एक आयत की लंबाई (x+3) और चौड़ाई (x) है। क्षेत्रफल (10) हो तो सही द्विघात समीकरण कौन-सा है?
A rectangle has length (x+3) and breadth (x). If its area is (10), which quadratic equation is correct?
#quadratic-equations
#word-problem
#area-model
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A \(x^2+3x-10=0\)
B \(x^2-3x-10=0\)
C \(x^2+3x+10=0\)
D \(3x^2+x-10=0\)
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Correct Answer
A. \(x^2+3x-10=0\)
Explanation
Simple Explanation
क्षेत्रफल (x(x+3)=10) होगा जिससे \(x^2+3x-10=0\) मिलता है। ज्यामिति प्रश्न में सूत्र से समीकरण बनाएं। / The area is (x(x+3)=10), which gives \(x^2+3x-10=0\). In geometry questions, form the equation using the formula.
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