\(x^2-18x+k\) को पूर्ण वर्ग बनाने के लिए (k) क्या होगा?

What will (k) be to make \(x^2-18x+k\) a perfect square?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. (81)

Step 1

Concept

Half of (-18) is (-9), and ((-9)2=81). Exam tip: the square becomes positive even with a negative sign.

Step 2

Why this answer is correct

The correct answer is A. (81). Half of (-18) is (-9), and ((-9)2=81). Exam tip: the square becomes positive even with a negative sign.

Step 3

Exam Tip

(-18) का आधा (-9) है और ((-9)2=81) है। परीक्षा में वर्ग लेते समय चिह्न से मान धन हो जाता है।

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Mathematics Answer, Explanation and Revision Hints

\(x^2-18x+k\) को पूर्ण वर्ग बनाने के लिए (k) क्या होगा? / What will (k) be to make \(x^2-18x+k\) a perfect square?

Correct Answer: A. (81). Explanation: (-18) का आधा (-9) है और ((-9)2=81) है। परीक्षा में वर्ग लेते समय चिह्न से मान धन हो जाता है। / Half of (-18) is (-9), and ((-9)2=81). Exam tip: the square becomes positive even with a negative sign.

Which concept should I revise for this Mathematics MCQ?

Half of (-18) is (-9), and ((-9)2=81). Exam tip: the square becomes positive even with a negative sign.

What exam hint can help solve this Mathematics question?

(-18) का आधा (-9) है और ((-9)2=81) है। परीक्षा में वर्ग लेते समय चिह्न से मान धन हो जाता है।