Find the sum: (-12x2 + 4x + 4) + (6x3 - 6x2 - x).

A. - 6x3 - 2x2 + 3x

B. 6x3 - 18x2 + 3x + 4

C. - 6x3 - 2x2 + 3

D. 6x3 + 18x2 + 4x + 3x

How to solve 18=3 (3x-6

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What is the formula for the sum of an infinite geometric series

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