Add or subtract as indicated. Express the answer as a single polynomial in standard form.(x2 + 1) - (8x2 - 4) + (x2 + x + 4)
A. -8x2 + x + 9
B. -6x2 + x + 9
C. -6x2 - 3x + 5
D. -7x2 + x + 9
Answer: B
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