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Question

Simplify: 42y2(36x249)28y(6x+7)

A
3y(6x7)
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B
3y(6x7)2
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C
3y(6x+7)2
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D
3y(6x+7)
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Solution

The correct option is B 3y(6x7)2
42y2(36x249)28y(6x+7)=14×3y[(6x)2(7)2]14×2(6x+7)

=3y(6x7)(6x+7)2(6x+7)=3y(6x7)2

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