Perform the indicated operation.(2x2 - 6x - 6) + (-5x2 - 7x + 9)
A. 7x2 - 13x - 15
B. 7x2 - 13x + 15
C. 3x2 + 13x + 3
D. -3x2 - 13x + 3
Answer: D
Mathematics
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