Add or subtract as indicated. Express the answer as a single polynomial in standard form.-6(1 - y3) - 9(1 + y + y2 + y3)
A. -3y3 + 9y2 - 9y + 15
B. -3y3 - 9y2 - 9y - 15
C. 3y3 - 9y2 - 9y - 15
D. -3y3 - 9 - ay2 - 9y - 15
Answer: B
Mathematics
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