यदि \(x^2+8x+12=0\) की जड़ें \(\alpha,\beta\) हैं, तो (\(\alpha-\beta\)2+3\alpha\beta) का मान क्या है?
If \(\alpha,\beta\) are roots of \(x^2+8x+12=0\), what is (\(\alpha-\beta\)2+3\alpha\beta)?
Explanation opens after your attempt
C. (52)
Concept
Here (\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=64-48=16). Therefore (16+3(12)=52).
Why this answer is correct
The correct answer is C. (52). Here (\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=64-48=16). Therefore (16+3(12)=52).
Exam Tip
(\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=64-48=16) है। इसलिए (16+3(12)=52)।
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