( (4a-5)2-\(16a^2+25\) ) का सरल रूप क्या है?

What is the simplified form of ( (4a-5)2-\(16a^2+25\) )?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

B. (-40a)

Step 1

Concept

The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.

Step 2

Why this answer is correct

The correct answer is B. (-40a). The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.

Step 3

Exam Tip

विस्तार \(16a^2-40a+25\) है इसलिए समान पद घटकर (-40a) बचता है। परीक्षा में ऋणात्मक मध्य पद न भूलें।

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Mathematics Answer, Explanation and Revision Hints

( (4a-5)2-\(16a^2+25\) ) का सरल रूप क्या है? / What is the simplified form of ( (4a-5)2-\(16a^2+25\) )?

Correct Answer: B. (-40a). Explanation: विस्तार \(16a^2-40a+25\) है इसलिए समान पद घटकर (-40a) बचता है। परीक्षा में ऋणात्मक मध्य पद न भूलें। / The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.

Which concept should I revise for this Mathematics MCQ?

The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.

What exam hint can help solve this Mathematics question?

विस्तार \(16a^2-40a+25\) है इसलिए समान पद घटकर (-40a) बचता है। परीक्षा में ऋणात्मक मध्य पद न भूलें।