Respuesta :

kittycatniah74

Answer:

4x^3-x^2+7x+15

Explanation:

2x^2+3x+1 plus 6x^3-3x+5 = 6x^3+2x^2+6

6x^3+2x^2+6 minus  2x^3-3x^2+7x+9= 4x^3-x^2+7x+15

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mery1518miley

Answer:

I think Cymath may help

Explanation:

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