Combine like terms.8x2 + 2x - 6x2 + 9x + 5

A. 2x2 + 11x + 5
B. 13x6 + 5
C. 10x3 + 3x3 + 5
D. 2x4 + 11x2 + 5

Answer: A

Mathematics

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A.  ? 

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C. ?

D.

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