Factor by grouping.x3 - 2x2 + 9x - 18
A. x(x2 - 2x + 9) - 18
B. (x2 - 2x) + 9(x - 2)
C. (x + 9)(x2 - 2x)(x - 2)
D. (x2 + 9)(x - 2)
Answer: D
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