![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\Factor the each monomial.
\15xy = 3 · 5 · x · y.
\7x2 = 1 · 7 · x · x.
\The GCF is the product of the common prime factors in each monomial.
\GCF = x.
\The greatest common factor of 15xy and 7x2 is x.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 15xy and 7x2 is x.