Add or subtract as indicated. Express the answer as a single polynomial in standard form.(6x5 + 3x2 - 6x) + (9x5 + 4x2 - 6x)

A. 10x8
B. 3x5 + 10x2 - 3x
C. 15x + 7x5 - 12x2
D. 15x5 + 7x2 - 12x


Answer: D

Mathematics

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