( (7a+2b)2-(7a-2b)2 ) का मान क्या है?
What is the value of ( (7a+2b)2-(7a-2b)2 )?
Explanation opens after your attempt
C. (56ab)
Concept
This is (4AB) where (A=7a) and (B=2b). Exam tip: calculate \(4\times7a\times2b=56ab\).
Why this answer is correct
The correct answer is C. (56ab). This is (4AB) where (A=7a) and (B=2b). Exam tip: calculate \(4\times7a\times2b=56ab\).
Exam Tip
यह (4AB) है जहाँ (A=7a) और (B=2b)। परीक्षा में \(4\times7a\times2b=56ab\) करें।
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