Add or subtract.(2x8 - 9x6 + 8x2 + 4) + (8x7 + 5x6 - 4x)
A. 2x8 + 8x7 - 4x6 + 8x2 - 4x + 4
B. 2x8 + 8x7 + 4x6 + 8x2 - 4x + 4
C. 10x8 - 14x6 + 8x2 - 4x + 4
D. 10x8 - 4x6 + 8x2 - 4x + 4
Answer: A
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