factor $3y^3 - 9y^2$. the factored polynomial is \\boxed{}.

$factor $3y^3 - 9y^2$. the factored polynomial is \\boxed{}.$

factor $3y^3 - 9y^2$. the factored polynomial is \boxed{}.

Find the greatest common factor (GCF) of $3y^3$ and $9y^2$. The GCF of 3 and 9 is 3, and the GCF of $y^3$ and $y^2$ is $y^2$. So the GCF is $3y^2$.

Factor out $3y^2$ from each term: $3y^3 - 9y^2 = 3y^2(y - 3)$.

$3y^2(y - 3)$