# How do you factor the expression -6x^2+(-6)x^3?

$\left(- 6 {x}^{2}\right) \left(1 + x\right)$
$\textcolor{w h i t e}{\text{XXX}} - 6 {x}^{2}$ and
$\textcolor{w h i t e}{\text{XXX}} \left(- 6\right) {x}^{3} = \left(- 6 {x}^{2}\right) \cdot \left(x\right)$
have an obvious common factor of $\left(- 6 {x}^{2}\right)$