यदि मूल \(\alpha\) और \(\beta\) हैं तथा \(\alpha+\beta=6\) और \(\alpha\beta=8\) है तो \(\alpha^2+\beta^2\) का मान क्या है?
If the roots are \(\alpha\) and \(\beta\) with \(\alpha+\beta=6\) and \(\alpha\beta=8\), what is \(\alpha^2+\beta^2\)?
Explanation opens after your attempt
A. (20)
Concept
(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta=36-16=20). Use identities in such questions.
Why this answer is correct
The correct answer is A. (20). (\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta=36-16=20). Use identities in such questions.
Exam Tip
(\alpha-2+\beta-2=\(\alpha+\beta\)2-2\alpha\beta=36-16=20) है। ऐसे प्रश्नों में पहचान का प्रयोग करें।
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