## College Algebra (6th Edition)

$x=-1$, $x=-2$ or $x=2$.
$x^3+x^2=4x+4\\x^3+x^2-4x-4=0\\x^2(x+1)-4(x+1)=0\\(x+1)(x^2-4)=0\\(x+1)(x+2)(x-2)=0$ Thus $x=-1$, $x=-2$ or $x=2$.