यदि \(u=6+\sqrt{5}\) और \(v=6-\sqrt{5}\) हैं तो (uv) का मान क्या है?
If \(u=6+\sqrt{5}\) and \(v=6-\sqrt{5}\), what is the value of (uv)?
Explanation opens after your attempt
A. (31)
Concept
Conjugate multiplication gives ((6)2-\(\sqrt{5}\)2=36-5=31). Use \(a^2-b^2\) in such questions.
Why this answer is correct
The correct answer is A. (31). Conjugate multiplication gives ((6)2-\(\sqrt{5}\)2=36-5=31). Use \(a^2-b^2\) in such questions.
Exam Tip
संयुग्मी गुणन से ((6)2-\(\sqrt{5}\)2=36-5=31) मिलता है। ऐसे प्रश्नों में \(a^2-b^2\) प्रयोग करें।
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