यदि \(\alpha\) और \(\beta\) \(x^2-3x-2\) के शून्यक हैं, तो (\(\alpha-\beta\)2) क्या है?
If \(\alpha\) and \(\beta\) are zeroes of \(x^2-3x-2\), what is (\(\alpha-\beta\)2)?
Explanation opens after your attempt
A. (17)
Concept
(\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=32-4(-2)=17). This method gives the answer without finding the zeroes.
Why this answer is correct
The correct answer is A. (17). (\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=32-4(-2)=17). This method gives the answer without finding the zeroes.
Exam Tip
(\(\alpha-\beta\)2=\(\alpha+\beta\)2-4\alpha\beta=32-4(-2)=17)। यह तरीका शून्यक निकाले बिना उत्तर देता है।
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