कौन-सा द्विघात व्यंजक ((x-4)(x+2)) से प्राप्त होता है?

Which quadratic expression is obtained from ((x-4)(x+2))?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. \(x^2-2x-8\)correct expansion

Step 1

Concept

The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.

Step 2

Why this answer is correct

The correct answer is A. \(x^2-2x-8\) / correct expansion. The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.

Step 3

Exam Tip

क्रॉस पद (2x) और (-4x) मिलकर (-2x) देते हैं। परीक्षा में बाहरी और अंदरूनी पद जोड़ें।

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Mathematics Answer, Explanation and Revision Hints

कौन-सा द्विघात व्यंजक ((x-4)(x+2)) से प्राप्त होता है? / Which quadratic expression is obtained from ((x-4)(x+2))?

Correct Answer: A. \(x^2-2x-8\) / correct expansion. Explanation: क्रॉस पद (2x) और (-4x) मिलकर (-2x) देते हैं। परीक्षा में बाहरी और अंदरूनी पद जोड़ें। / The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.

Which concept should I revise for this Mathematics MCQ?

The cross terms (2x) and (-4x) combine to (-2x). In exams add outer and inner terms.

What exam hint can help solve this Mathematics question?

क्रॉस पद (2x) और (-4x) मिलकर (-2x) देते हैं। परीक्षा में बाहरी और अंदरूनी पद जोड़ें।