# How do you factor the expression 6x^3y – 9x^2y^2 + 3x^2y?

The common facor is $3 {x}^{2} y$, factor it out:
$6 {x}^{3} y - 9 {x}^{2} {y}^{2} + 3 {x}^{2} y = 3 {x}^{2} y \left(2 x - 3 y + 1\right)$