What is the standard form of $y= (x-5)(x+2)^2$ ?

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Answer 1 · 2016-01-06T09:14:43

$y = x^3 -x^2-15x -20$

Expand the equation to get rid of the brackets
$y = (x-5)(x^2 + 4x +4)$
$y= (x^3 +4x^2 +4x - 5x^2 -20x - 20)$
$y = x^3 -x^2-15x -20$

What is the standard form of y= (x-5)(x+2)^2 y= (x-5)(x+2)^2 ?