यदि \(x^2-7x-30=0\) के मूल \(\alpha,\beta\) हैं, तो \(\alpha\beta+4\alpha+4\beta\) का मान क्या है?
If \(\alpha,\beta\) are roots of \(x^2-7x-30=0\), what is \(\alpha\beta+4\alpha+4\beta\)?
Explanation opens after your attempt
Correct Answer
A. -(2)
Concept
Here \(\alpha+\beta=7\) and \(\alpha\beta=-30\). Thus (\alpha\beta+4\alpha+4\beta=-30+4(7)=-2).
Why this answer is correct
The correct answer is A. -(2). Here \(\alpha+\beta=7\) and \(\alpha\beta=-30\). Thus (\alpha\beta+4\alpha+4\beta=-30+4(7)=-2).
Exam Tip
यहाँ \(\alpha+\beta=7\) और \(\alpha\beta=-30\) है। इसलिए (\alpha\beta+4\alpha+4\beta=-30+4(7)=-2)।
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