![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Method 1:
\Factor the each monomial.
\8c = 2 · 3 · 3 · c
\4c = 2 · 2 · c
\The GCF is the product of the common prime factors in each monomial.
\GCF = 2 · c
\The greatest common factor of 8c and 4c is 2c.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The greatest common factor of 8c and 4c is 2c.