Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 11-20 of 550 questions.
If (x=2), what is the left side of \(x^2-5x+6=0\)?
A. (0)
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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Which value is one solution of \(x^2-9=0\)?
B. (3)
\(3^2-9=0\) 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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What do we get by putting (x=2) in \(x^2-4x+4=0\)?
A. (0=0)
\(2^2-4\cdot2+4=0\) 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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Which of the following is a quadratic polynomial?
B. \(x^2-3x+2\)
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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Which equation is not quadratic?
C. \(x^3+x+1=0\)
\(x^3+x+1=0\) 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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For \(6x^2=0\), what are (a), (b), (c) respectively?
A. (6,0,0)
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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Write (x(x+5)=0) in standard form.
A. \(x^2+5x=0\)
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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What is the expanded form of ((x+2)(x+3)=0)?
A. \(x^2+5x+6=0\)
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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Which is the standard form of ((x-4)(x+1)=0)?
A. \(x^2-3x-4=0\)
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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What is the coefficient of \(x^2\) in \(x^2+8x+16=0\)?
B. (1)
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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