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Question

Choose the correct answer x(2x-12x)-2x(x-1x)equals:


A

-32

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B

32

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C

0

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D

1

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Solution

The correct option is B

32


Justification of answer:

To simplify : x(2x-12x)-2x(x-1x)

x(2x-12x)-2x(x-1x) =x×2×x-x×12x-2×x×x+2×x×1x

=2x2-1×12×1-2x2+2×1×11 (am÷an=am-n)

=2x2-12-2x2+2

=2x2-2x2+2-12

=2-12

=4-12

=32

Thus, option B is the correct answer


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