What is the standard form of $y= (x-x^2)(x+8) -(x+8)^3$ ?

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Answer 1 · 2018-08-11T14:31:35

$-2x^3 - 31x^2 - 184x - 512$

$(x - x^2) (x + 8) - (x + 8)^3$

$-(x + 8) [x^2 - x + (x + 8)^2]$

$-(x + 8) (x^2 - x + x^2 + 16x + 64)$

$-(x + 8) (2x^2 + 15x + 64)$

$-2x^3 - 31x^2 - 184x - 512$

What is the standard form of y= (x-x^2)(x+8) -(x+8)^3y= (x-x^2)(x+8) -(x+8)^3?