![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Factor the each monomial.
\12y2 = 2 · 2 · 3 · y · y
\15y3 = 3 · 5 · y · y · y
\5y = 5 · y
\The GCF is the product of the common prime factors in each monomial.
\GCF = y
\The greatest common factor of 12y2, 15y3 and 5y is y.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 12y2, 15y3 and 5y is y.
\