Which is the sum of 7x³ – 6x² + 9 and x³ + 4x² + 3?
A. 7x³ – 2x² + 12
B. 8x³ – 2x² + 12
C. 7x³ + 10x² + 12
D. 8x³ + 10x² + 12
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Step-by-step explanation:
C.7x³+10x²+12
I think it's right answer
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