Expand.
4
A. x2 + 4x + 6 + 4x-1 - x-2
B. x2 - 4x - 6 - 4x-1 + x-2
C. x2 + 4x - 6 + 4x-1 - x-2
D. x2 - 4x + 6 - 4x-1 + x-2
Answer: D
Mathematics
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