Simplify the exponential expression.x7 ? x-3

A.
B. -x4
C. - 
D. x4

Answer: D

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A. 1
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A.
B.
C.
D. 2

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A. (-1, 2) B. (-1, -2) C. (-1, 3) D. (-1, -3)

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Find the product.(9y + x)(9y - x)

A. 81y2 + 18xy - x2 B. 81y2 - 18xy - x2 C. 81y2 - x2 D. 18y2 - x2

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