## Precalculus (6th Edition) Blitzer

$(x + 4)(x^2 - 4x + 16)$.
Recall that $a^3 + b^3 = (a + b)(a^2 - ab + b^2)$. $x^3+64=x^3+4^3$ We use this to simplify the expression: $x^3+64=(x + 4)(x^2 - 4x + 4^2)$.