How do you factor $2x^3+4x^2-18x-36$ ?

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Answer 1 · 2015-05-03T20:45:09

Group and extract common factors from subgroups before recombining:

$color(red)(2x^3+4x^2)color(blue)(-18x-36)$

$=color(red)((2x^2)(x+2)) -color(blue)((18)(x+2))$

$=(2x-18)(x+2)$
or
$=2(x-9)(x+2)$

How do you factor 2x^3+4x^2-18x-362x^3+4x^2-18x-36?