What is the value of $(x + 1) ( x^2 - x + 1)$ ?

$x^3 - 1$ $x^3 +x$ $x^3 + 1$ $x^3 - x$

$x^3 + 1$

$(x + 1) ( x^2 - x + 1)$ = $(x + 1) ( x^2 - x + (1)^3)$ So this is the formula of $x^3 + 1^3$ =  $x^3 + 1$