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Question

The product (x+2)(x2−2x+4) is equal to

A
x3+8
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B
x38
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C
x34x2+4x8
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D
x3+4x2+2x+8
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Solution

The correct option is A x3+8
(x+2)(x22x+4)

= x(x22x+4)+2(x22x+4)

= x32x2+4x+2x24x+8

= x3+8

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