यदि \(x^2-6x+5=0\) की जड़ें \(\alpha,\beta\) हैं, तो \(\alpha^2-5\alpha+\beta^2-5\beta\) का मान क्या है?
If \(\alpha,\beta\) are roots of \(x^2-6x+5=0\), what is \(\alpha^2-5\alpha+\beta^2-5\beta\)?
Explanation opens after your attempt
B. (-4)
Concept
Here \(\alpha+\beta=6\) and \(\alpha\beta=5\). Since \(\alpha^2+\beta^2=26\), the value is (26-5\(\alpha+\beta\)=-4).
Why this answer is correct
The correct answer is B. (-4). Here \(\alpha+\beta=6\) and \(\alpha\beta=5\). Since \(\alpha^2+\beta^2=26\), the value is (26-5\(\alpha+\beta\)=-4).
Exam Tip
\(\alpha+\beta=6\) और \(\alpha\beta=5\) है। \(\alpha^2+\beta^2=26\), इसलिए (26-5\(\alpha+\beta\)=-4)।
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