Remove the parentheses and simplify, if possible.(6x8 - 9x4 + 7x2 + 8) + (6x7 + 3x4 - 8x)

A. 6x8 + 6x7 - 6x4 + 7x2 - 8x + 8
B. 12x8 - 12x4 + 7x2 - 8x + 8
C. 6x8 + 6x7 + 6x4 + 7x2 - 8x + 8
D. 12x8 - 6x4 + 7x2 - 8x + 8


Answer: A

Mathematics

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