Add or subtract.(6x8 - 7x6 + 5x2 + 9) + (6x7 + 3x6 - 5x)

A. 12x8 - 4x6 + 5x2 - 5x + 9
B. 6x8 + 6x7 - 4x6 + 5x2 - 5x + 9
C. 12x8 - 10x6 + 5x2 - 5x + 9
D. 6x8 + 6x7 + 4x6 + 5x2 - 5x + 9


Answer: B

Mathematics

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