![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Factor the each monomial.
\3x2 = 3 · x · x
\15x3 = 3 · 5 · x · x · x
\The GCF is the product of the common prime factors in each monomial.
\GCF = 3 · x · x
\The greatest common factor of 3x2 and 15x3 is 3x2.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 3x2 and 15x3 is 3x2.