( (2x+5)2-(2x-5)2 ) का मान क्या है?

What is the value of ( (2x+5)2-(2x-5)2 )?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (40x)

Step 1

Concept

This is ( (a+b)2-(a-b)2=4ab ) where (a=2x) and (b=5). Exam tip: use the (4ab) identity quickly.

Step 2

Why this answer is correct

The correct answer is B. (40x). This is ( (a+b)2-(a-b)2=4ab ) where (a=2x) and (b=5). Exam tip: use the (4ab) identity quickly.

Step 3

Exam Tip

यह ( (a+b)2-(a-b)2=4ab ) है जहाँ (a=2x) और (b=5)। परीक्षा में (4ab) पहचान जल्दी लगाएँ।

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Mathematics Answer, Explanation and Revision Hints

( (2x+5)2-(2x-5)2 ) का मान क्या है? / What is the value of ( (2x+5)2-(2x-5)2 )?

Correct Answer: B. (40x). Explanation: यह ( (a+b)2-(a-b)2=4ab ) है जहाँ (a=2x) और (b=5)। परीक्षा में (4ab) पहचान जल्दी लगाएँ। / This is ( (a+b)2-(a-b)2=4ab ) where (a=2x) and (b=5). Exam tip: use the (4ab) identity quickly.

Which concept should I revise for this Mathematics MCQ?

This is ( (a+b)2-(a-b)2=4ab ) where (a=2x) and (b=5). Exam tip: use the (4ab) identity quickly.

What exam hint can help solve this Mathematics question?

यह ( (a+b)2-(a-b)2=4ab ) है जहाँ (a=2x) और (b=5)। परीक्षा में (4ab) पहचान जल्दी लगाएँ।