यदि \(x^2-8x+k\) के शून्यक \(\alpha\) और \(\beta\) हैं तथा \(\alpha-\beta=2\), तो (k) क्या है?
If \(\alpha\) and \(\beta\) are zeroes of \(x^2-8x+k\) and \(\alpha-\beta=2\), what is (k)?
Explanation opens after your attempt
A. (15)
Concept
From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).
Why this answer is correct
The correct answer is A. (15). From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).
Exam Tip
योग (8) और अंतर (2) से शून्यक (5) और (3) हैं। गुणनफल (15) है इसलिए (k=15)।
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