(\(\sqrt{7}+\sqrt{5}\)2-\(\sqrt{7}-\sqrt{5}\)2) का मान क्या है?
What is the value of (\(\sqrt{7}+\sqrt{5}\)2-\(\sqrt{7}-\sqrt{5}\)2)?
Explanation opens after your attempt
Correct Answer
A. \(4\sqrt{35}\)
Concept
Use ((a+b)2-(a-b)2=4ab). Here the value is \(4\sqrt{35}\).
Why this answer is correct
The correct answer is A. \(4\sqrt{35}\). Use ((a+b)2-(a-b)2=4ab). Here the value is \(4\sqrt{35}\).
Exam Tip
पहचान ((a+b)2-(a-b)2=4ab) लगाएं। यहाँ मान \(4\sqrt{35}\) है।
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