\(81-a^2\) का गुणनखंड रूप क्या होगा?

What will be the factorised form of \(81-a^2\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

D. ((9-a)(9+a))

Step 1

Concept

Since \(81=9^2\), (81-a-2=(9-a)(9+a)). Exam tip: take (9) as the square root of the first term.

Step 2

Why this answer is correct

The correct answer is D. ((9-a)(9+a)). Since \(81=9^2\), (81-a-2=(9-a)(9+a)). Exam tip: take (9) as the square root of the first term.

Step 3

Exam Tip

\(81=9^2\), इसलिए (81-a-2=(9-a)(9+a)) है। परीक्षा में पहले पद की वर्गमूल (9) लें।

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FAQs

Mathematics Answer, Explanation and Revision Hints

\(81-a^2\) का गुणनखंड रूप क्या होगा? / What will be the factorised form of \(81-a^2\)?

Correct Answer: D. ((9-a)(9+a)). Explanation: \(81=9^2\), इसलिए (81-a-2=(9-a)(9+a)) है। परीक्षा में पहले पद की वर्गमूल (9) लें। / Since \(81=9^2\), (81-a-2=(9-a)(9+a)). Exam tip: take (9) as the square root of the first term.

Which concept should I revise for this Mathematics MCQ?

Since \(81=9^2\), (81-a-2=(9-a)(9+a)). Exam tip: take (9) as the square root of the first term.

What exam hint can help solve this Mathematics question?

\(81=9^2\), इसलिए (81-a-2=(9-a)(9+a)) है। परीक्षा में पहले पद की वर्गमूल (9) लें।