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Question

−2(1−m2)−4m2−(2−m2)equals


A

6m2+6

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B

6m26

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C

6m2+6

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D

6m2+6

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Solution

The correct option is D

6m2+6


2(1m2)4m2(2m2)

=2+2m24m22+m2

=2+2m242m22

=2+2m28m2+8

=6m2+6


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