## Algebra 2 Common Core

$x^3-36x=x(x-6)(x+6)$
Factor out the GCF $x$ to get $x(x^2-36)$. Factor the difference of two squares: $x(x-6)(x+6)$. Check by multiplying the factors: $=x(x^2+6x-6x-36) \\=x(x^2-36) \\=x^3-36x$.