\(a^2-2ab+b^2-9\) का गुणनखंडन कौन सा है?

Which is the factorisation of \(a^2-2ab+b^2-9\)?

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

A. ((a-b-3)(a-b+3))

Step 1

Concept

First write (a-2-2ab+b-2=(a-b)2). Then subtract \(9=3^2\) to make difference of squares.

Step 2

Why this answer is correct

The correct answer is A. ((a-b-3)(a-b+3)). First write (a-2-2ab+b-2=(a-b)2). Then subtract \(9=3^2\) to make difference of squares.

Step 3

Exam Tip

पहले (a-2-2ab+b-2=(a-b)2) लिखें। फिर \(9=3^2\) घटाकर वर्गों का अंतर बनाएं।

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Mathematics Answer, Explanation and Revision Hints

\(a^2-2ab+b^2-9\) का गुणनखंडन कौन सा है? / Which is the factorisation of \(a^2-2ab+b^2-9\)?

Correct Answer: A. ((a-b-3)(a-b+3)). Explanation: पहले (a-2-2ab+b-2=(a-b)2) लिखें। फिर \(9=3^2\) घटाकर वर्गों का अंतर बनाएं। / First write (a-2-2ab+b-2=(a-b)2). Then subtract \(9=3^2\) to make difference of squares.

Which concept should I revise for this Mathematics MCQ?

First write (a-2-2ab+b-2=(a-b)2). Then subtract \(9=3^2\) to make difference of squares.

What exam hint can help solve this Mathematics question?

पहले (a-2-2ab+b-2=(a-b)2) लिखें। फिर \(9=3^2\) घटाकर वर्गों का अंतर बनाएं।