यदि \(\alpha=\sqrt{5}+2\) और \(\beta=\sqrt{5}-2\), तो \(\alpha\beta\) क्या है?
If \(\alpha=\sqrt{5}+2\) and \(\beta=\sqrt{5}-2\), what is \(\alpha\beta\)?
Explanation opens after your attempt
Correct Answer
A. (1)
Concept
(\alpha\beta=\(\sqrt{5}+2\)\(\sqrt{5}-2\)=5-4=1). Conjugate multiplication often gives a rational answer.
Why this answer is correct
The correct answer is A. (1). (\alpha\beta=\(\sqrt{5}+2\)\(\sqrt{5}-2\)=5-4=1). Conjugate multiplication often gives a rational answer.
Exam Tip
(\alpha\beta=\(\sqrt{5}+2\)\(\sqrt{5}-2\)=5-4=1) है। परीक्षा में संयुग्मी गुणन से परिमेय उत्तर मिलता है।
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