Factor completely.3x3 + 81y3

A. 3(x - 3y)(x2 + 3xy + 9y2)
B. 3(x + 3)(x2 - 3x + 9)
C. 3(x + 3y)(x2 - 3xy + 9y2)
D. (x + 3y)(x2 - 3xy + 9y)


Answer: C

Mathematics

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A.
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