Mathematics, 30.04.2021 06:40, emmalado45

Add the polynomials and explain how you arrived at your answer. (9p3 + 5r2 + 11r) + (-2m3 + 9r – 8r²)
(pls help)

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Add the polynomials and explain how you arrived at your answer. (9p3 + 5r2 + 11r) + (-2m3 + 9r – 8...