Simplify.-(-9x4 + 9x2 + x - 4)

A. 9x4 + 9x2 + x - 4
B. 9x4 + 9x2 - x + 4
C. 9x4 - 9x2 - x + 4
D. -9x4 + 9x2 + x - 4

Answer: C

Mathematics

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