\(x^2+6x+k\) को पूर्ण वर्ग बनाने के लिए (k) का मान क्या होना चाहिए?

What should be the value of (k) to make \(x^2+6x+k\) a perfect square?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (9)

Step 1

Concept

Half of (6) is (3), so the constant term should be \(3^2=9\). Exam tip: square half the coefficient of (x).

Step 2

Why this answer is correct

The correct answer is B. (9). Half of (6) is (3), so the constant term should be \(3^2=9\). Exam tip: square half the coefficient of (x).

Step 3

Exam Tip

(6x) का आधा (3x) है इसलिए स्थिर पद \(3^2=9\) चाहिए। परीक्षा में (x) के गुणांक का आधा करके वर्ग करें।

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Mathematics Answer, Explanation and Revision Hints

\(x^2+6x+k\) को पूर्ण वर्ग बनाने के लिए (k) का मान क्या होना चाहिए? / What should be the value of (k) to make \(x^2+6x+k\) a perfect square?

Correct Answer: B. (9). Explanation: (6x) का आधा (3x) है इसलिए स्थिर पद \(3^2=9\) चाहिए। परीक्षा में (x) के गुणांक का आधा करके वर्ग करें। / Half of (6) is (3), so the constant term should be \(3^2=9\). Exam tip: square half the coefficient of (x).

Which concept should I revise for this Mathematics MCQ?

Half of (6) is (3), so the constant term should be \(3^2=9\). Exam tip: square half the coefficient of (x).

What exam hint can help solve this Mathematics question?

(6x) का आधा (3x) है इसलिए स्थिर पद \(3^2=9\) चाहिए। परीक्षा में (x) के गुणांक का आधा करके वर्ग करें।