((x+a)2) में (x) का गुणांक (14) है। (a) का मान क्या है?

In ((x+a)2), the coefficient of (x) is (14). What is the value of (a)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (7)

Step 1

Concept

((x+a)2=x-2+2ax+a-2), so (2a=14) and (a=7). Exam tip: treat the middle coefficient as (2a).

Step 2

Why this answer is correct

The correct answer is B. (7). ((x+a)2=x-2+2ax+a-2), so (2a=14) and (a=7). Exam tip: treat the middle coefficient as (2a).

Step 3

Exam Tip

((x+a)2=x-2+2ax+a-2) है इसलिए (2a=14) और (a=7)। परीक्षा में मध्य गुणांक को (2a) मानें।

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Mathematics Answer, Explanation and Revision Hints

((x+a)2) में (x) का गुणांक (14) है। (a) का मान क्या है? / In ((x+a)2), the coefficient of (x) is (14). What is the value of (a)?

Correct Answer: B. (7). Explanation: ((x+a)2=x-2+2ax+a-2) है इसलिए (2a=14) और (a=7)। परीक्षा में मध्य गुणांक को (2a) मानें। / ((x+a)2=x-2+2ax+a-2), so (2a=14) and (a=7). Exam tip: treat the middle coefficient as (2a).

Which concept should I revise for this Mathematics MCQ?

((x+a)2=x-2+2ax+a-2), so (2a=14) and (a=7). Exam tip: treat the middle coefficient as (2a).

What exam hint can help solve this Mathematics question?

((x+a)2=x-2+2ax+a-2) है इसलिए (2a=14) और (a=7)। परीक्षा में मध्य गुणांक को (2a) मानें।