Add or subtract.(x3 - 3x2 + 20x) - (6x2 - 6x + 13)

A. x3 - 9x2 + 26x - 13
B. x3 - 9x2 + 14x + 13
C. x3 - 9x2 + 14x - 13
D. x3 + 9x2 - 14x - 13


Answer: A

Mathematics

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