\(x^2-4x-21\) को गुणनखंडों में लिखिए।

Write \(x^2-4x-21\) in factors.

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

A. ((x-7)(x+3))

Step 1

Concept

(-7+3=-4) and ((-7)(3)=-21). In exams, keep the larger factor's sign like the middle term.

Step 2

Why this answer is correct

The correct answer is A. ((x-7)(x+3)). (-7+3=-4) and ((-7)(3)=-21). In exams, keep the larger factor's sign like the middle term.

Step 3

Exam Tip

(-7+3=-4) और ((-7)(3)=-21) है। परीक्षा में बड़े गुणनखंड का चिह्न मध्य पद जैसा रखें।

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Mathematics Answer, Explanation and Revision Hints

\(x^2-4x-21\) को गुणनखंडों में लिखिए। / Write \(x^2-4x-21\) in factors.

Correct Answer: A. ((x-7)(x+3)). Explanation: (-7+3=-4) और ((-7)(3)=-21) है। परीक्षा में बड़े गुणनखंड का चिह्न मध्य पद जैसा रखें। / (-7+3=-4) and ((-7)(3)=-21). In exams, keep the larger factor's sign like the middle term.

Which concept should I revise for this Mathematics MCQ?

(-7+3=-4) and ((-7)(3)=-21). In exams, keep the larger factor's sign like the middle term.

What exam hint can help solve this Mathematics question?

(-7+3=-4) और ((-7)(3)=-21) है। परीक्षा में बड़े गुणनखंड का चिह्न मध्य पद जैसा रखें।