How do you simplify $(-8x^3+4x^2-6x+9) + (15x^3+3x^2-8x-17)$ ?

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Answer 1 · 2015-04-13T10:44:23

By adding like powers (the brackets in the problem have no function):

$(-8+15)x^3+(4+3)x^2+(-6-8)x+(9-17)$

$=7x^3+7x^2-14x-8$

How do you simplify (-8x^3+4x^2-6x+9) + (15x^3+3x^2-8x-17)(-8x^3+4x^2-6x+9) + (15x^3+3x^2-8x-17)?