\(x^2+4x-45\) का सही गुणनखंड कौन-सा है?

Which is the correct factorisation of \(x^2+4x-45\)?

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

A. ((x+9)(x-5))

Step 1

Concept

(9-5=4) and (9\cdot(-5)=-45). In exams, keep the larger number's sign like the middle term.

Step 2

Why this answer is correct

The correct answer is A. ((x+9)(x-5)). (9-5=4) and (9\cdot(-5)=-45). In exams, keep the larger number's sign like the middle term.

Step 3

Exam Tip

(9-5=4) और (9\cdot(-5)=-45) है। परीक्षा में बड़ी संख्या का चिह्न मध्य पद जैसा रखें।

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Mathematics Answer, Explanation and Revision Hints

\(x^2+4x-45\) का सही गुणनखंड कौन-सा है? / Which is the correct factorisation of \(x^2+4x-45\)?

Correct Answer: A. ((x+9)(x-5)). Explanation: (9-5=4) और (9\cdot(-5)=-45) है। परीक्षा में बड़ी संख्या का चिह्न मध्य पद जैसा रखें। / (9-5=4) and (9\cdot(-5)=-45). In exams, keep the larger number's sign like the middle term.

Which concept should I revise for this Mathematics MCQ?

(9-5=4) and (9\cdot(-5)=-45). In exams, keep the larger number's sign like the middle term.

What exam hint can help solve this Mathematics question?

(9-5=4) और (9\cdot(-5)=-45) है। परीक्षा में बड़ी संख्या का चिह्न मध्य पद जैसा रखें।