Add or subtract as indicated.(-7x2y2 - 11y4) + (9x2y2 + 15y4)

A. -63x4y4 - 165y8
B. 2x4y4 + 4y8
C. 2x2y2 + 4y4
D. 2x2y2 - 4y4


Answer: C

Mathematics

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