Question 84525
{{{(y^3-12y^2+36y)}}} [find the greatest common factor of all of the terms (y)]
{{{(y^3/y-12y^2/y+36y/y)}}} [divide each term by the GCF]
{{{(y)(y^2-12y+36)}}} [place the GCF on the outside; divide and cancel wherever possible]
.
(y)(y-6)(y-6) [continue to factor as much as possible]
.
check by multiplying all of the factors.  you should get your original answer.