यदि \(a=8+\sqrt{7}\) और \(b=8-\sqrt{7}\) हैं तो \(a^2-b^2\) का मान क्या है?
If \(a=8+\sqrt{7}\) and \(b=8-\sqrt{7}\), what is the value of \(a^2-b^2\)?
Explanation opens after your attempt
B. \(32\sqrt{7}\)
Concept
\(a-b=2\sqrt{7}\) and (a+b=16). Therefore \(a^2-b^2=32\sqrt{7}\).
Why this answer is correct
The correct answer is B. \(32\sqrt{7}\). \(a-b=2\sqrt{7}\) and (a+b=16). Therefore \(a^2-b^2=32\sqrt{7}\).
Exam Tip
\(a-b=2\sqrt{7}\) और (a+b=16) है। इसलिए \(a^2-b^2=32\sqrt{7}\) है।
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