Remove the parentheses and simplify, if possible.(-8 + 9n2 + 4n) + (4n2 + 4n + 7)
A. 20n2 + 8n - 1
B. 13n2 + 8n + 7
C. -4n2 + 13n + 11
D. 13n2 + 8n - 1
Answer: D
Mathematics
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