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
Correct Answer

A. (15)

Step 1

Concept

From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).

Step 2

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).

Step 3

Exam Tip

योग (8) और अंतर (2) से शून्यक (5) और (3) हैं। गुणनफल (15) है इसलिए (k=15)।

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Mathematics Answer, Explanation and Revision Hints

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)?

Correct Answer: A. (15). Explanation: योग (8) और अंतर (2) से शून्यक (5) और (3) हैं। गुणनफल (15) है इसलिए (k=15)। / From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).

Which concept should I revise for this Mathematics MCQ?

From sum (8) and difference (2), the zeroes are (5) and (3). Their product is (15), so (k=15).

What exam hint can help solve this Mathematics question?

योग (8) और अंतर (2) से शून्यक (5) और (3) हैं। गुणनफल (15) है इसलिए (k=15)।