यदि \(x^2-6x+n=0\) की जड़ें \(\alpha,\beta\) हैं और \(\alpha^2+\beta^2=20\), तो (n) का मान क्या है?
If \(\alpha,\beta\) are the roots of \(x^2-6x+n=0\) and \(\alpha^2+\beta^2=20\), what is the value of (n)?
Explanation opens after your attempt
A. (8)
Concept
Here \(\alpha+\beta=6\) and \(\alpha\beta=n\). From (36-2n=20), we get (n=8).
Why this answer is correct
The correct answer is A. (8). Here \(\alpha+\beta=6\) and \(\alpha\beta=n\). From (36-2n=20), we get (n=8).
Exam Tip
\(\alpha+\beta=6\) और \(\alpha\beta=n\) है। (36-2n=20) से (n=8) मिलता है।
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