यदि \(2x^2+kx-15\) में (x=3) रखने पर मान (0) मिलता है, तो (k) क्या होगा?

If substituting (x=3) in \(2x^2+kx-15\) gives (0), what is (k)?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

A. (-1)

Step 1

Concept

From (2(3)2+3k-15=0), (18+3k-15=0). Hence (3k=-3) and (k=-1).

Step 2

Why this answer is correct

The correct answer is A. (-1). From (2(3)2+3k-15=0), (18+3k-15=0). Hence (3k=-3) and (k=-1).

Step 3

Exam Tip

(2(3)2+3k-15=0) से (18+3k-15=0)। इसलिए (3k=-3) और (k=-1)।

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Mathematics Answer, Explanation and Revision Hints

यदि \(2x^2+kx-15\) में (x=3) रखने पर मान (0) मिलता है, तो (k) क्या होगा? / If substituting (x=3) in \(2x^2+kx-15\) gives (0), what is (k)?

Correct Answer: A. (-1). Explanation: (2(3)2+3k-15=0) से (18+3k-15=0)। इसलिए (3k=-3) और (k=-1)। / From (2(3)2+3k-15=0), (18+3k-15=0). Hence (3k=-3) and (k=-1).

Which concept should I revise for this Mathematics MCQ?

From (2(3)2+3k-15=0), (18+3k-15=0). Hence (3k=-3) and (k=-1).

What exam hint can help solve this Mathematics question?

(2(3)2+3k-15=0) से (18+3k-15=0)। इसलिए (3k=-3) और (k=-1)।