यदि \(a=5+\sqrt{3}\) और \(b=5-\sqrt{3}\) हैं, तो \(a^2-b^2\) का मान क्या है?
If \(a=5+\sqrt{3}\) and \(b=5-\sqrt{3}\), what is the value of \(a^2-b^2\)?
Explanation opens after your attempt
Correct Answer
A. \(20\sqrt{3}\)
Concept
(a-2-b-2=(a-b)(a+b)), where \(a-b=2\sqrt{3}\) and (a+b=10). So the value is \(20\sqrt{3}\).
Why this answer is correct
The correct answer is A. \(20\sqrt{3}\). (a-2-b-2=(a-b)(a+b)), where \(a-b=2\sqrt{3}\) and (a+b=10). So the value is \(20\sqrt{3}\).
Exam Tip
(a-2-b-2=(a-b)(a+b)), जहाँ \(a-b=2\sqrt{3}\) और (a+b=10) है। इसलिए मान \(20\sqrt{3}\) है।
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