How do you factor completely: -5x^3 + 10x^2?

$- 5 {x}^{2} \left(x - 2\right)$
$\text{take out a "color(blue)"common factor } - 5 {x}^{2}$
$\Rightarrow - 5 {x}^{3} + 10 {x}^{2} = - 5 {x}^{2} \left(x - 2\right)$