\(4x^2+mx+25\) पूर्ण वर्ग हो तो (m) का धनात्मक मान क्या है?

If \(4x^2+mx+25\) is a perfect square, what is the positive value of (m)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (20)

Step 1

Concept

(4x-2=(2x)2) and \(25=5^2\). The middle term will be \(2\cdot2x\cdot5=20x\).

Step 2

Why this answer is correct

The correct answer is B. (20). (4x-2=(2x)2) and \(25=5^2\). The middle term will be \(2\cdot2x\cdot5=20x\).

Step 3

Exam Tip

(4x-2=(2x)2) और \(25=5^2\) हैं। मध्य पद \(2\cdot2x\cdot5=20x\) होगा।

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Mathematics Answer, Explanation and Revision Hints

\(4x^2+mx+25\) पूर्ण वर्ग हो तो (m) का धनात्मक मान क्या है? / If \(4x^2+mx+25\) is a perfect square, what is the positive value of (m)?

Correct Answer: B. (20). Explanation: (4x-2=(2x)2) और \(25=5^2\) हैं। मध्य पद \(2\cdot2x\cdot5=20x\) होगा। / (4x-2=(2x)2) and \(25=5^2\). The middle term will be \(2\cdot2x\cdot5=20x\).

Which concept should I revise for this Mathematics MCQ?

(4x-2=(2x)2) and \(25=5^2\). The middle term will be \(2\cdot2x\cdot5=20x\).

What exam hint can help solve this Mathematics question?

(4x-2=(2x)2) और \(25=5^2\) हैं। मध्य पद \(2\cdot2x\cdot5=20x\) होगा।