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 221-230 of 604 questions.
Which option gives the correct sum of \(2x^2\) and \(-5x^2\)?
C. \(-3x^2\)
गुणांक (2+(-5)=-3) हैं और चर भाग \(x^2\) वही रहता है। इसलिए योग \(-3x^2\) है। / The coefficients are (2+(-5)=-3), and the variable part \(x^2\) stays the same. So the sum is \(-3x^2\).
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What is the simplified form of (5(a-2)-2(a+1))?
A. (3a-12)
खोलने पर (5a-10-2a-2=3a-12) मिलता है। ऋण चिह्न को पूरे कोष्ठक पर लागू करें। / On expanding, (5a-10-2a-2=3a-12). Apply the negative sign to the whole bracket.
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If (x=-1), what is the value of \(x^2-4x+3\)?
C. (8)
(x=-1) रखने पर (1+4+3=8) मिलता है। (-4(-1)) का मान (4) होगा। / Putting (x=-1) gives (1+4+3=8). The value of (-4(-1)) is (4).
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In which expression is the coefficient of (x) equal to (0)?
B. \(x^2+6\)
\(x^2+6\) में (x) का प्रथम घात वाला पद नहीं है। इसलिए (x) का गुणांक (0) माना जाता है। / In \(x^2+6\), there is no first-power (x) term. So the coefficient of (x) is taken as (0).
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What is the simplified form of (8k-3(2k-1))?
B. (2k+3)
(8k-3(2k-1)=8k-6k+3=2k+3)। कोष्ठक से पहले ऋणात्मक गुणन ध्यान से करें। / (8k-3(2k-1)=8k-6k+3=2k+3). Handle negative multiplication before brackets carefully.
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B. (4x+6)
परिमाप (2[(x+4)+(x-1)]=2(2x+3)=4x+6) है। पहले लंबाई और चौड़ाई जोड़ें। / The perimeter is (2[(x+4)+(x-1)]=2(2x+3)=4x+6). Add length and breadth first.
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What is obtained by expanding (x(x+3))?
A. \(x^2+3x\)
(x) को (x) और (3) दोनों से गुणा करें। इससे \(x^2+3x\) मिलता है। / Multiply (x) by both (x) and (3). This gives \(x^2+3x\).
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If (m=2) and (n=4), what is the value of \(mn+m^2\)?
C. (12)
(mn+m-2=2(4)+22=8+4=12)। गुणन और घात दोनों सही क्रम में करें। / (mn+m-2=2(4)+22=8+4=12). Do multiplication and powers in the correct order.
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Which statement about (xy) and (x+y) is correct?
B. (xy) गुणन है और (x+y) योग है(xy) is product and (x+y) is sum
साथ लिखे गए चर गुणन दर्शाते हैं और (+) चिह्न योग दर्शाता है। इसलिए (xy) और (x+y) अलग व्यंजक हैं। / Variables written together show multiplication and the (+) sign shows addition. So (xy) and (x+y) are different expressions.
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What is the simplified form of (6x-2(3x-5))?
A. (10)
(6x-2(3x-5)=6x-6x+10=10)। समान पद कट सकते हैं इसलिए अंतिम उत्तर नियतांक हो सकता है। / (6x-2(3x-5)=6x-6x+10=10). Like terms can cancel, so the final answer may be a constant.
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