Question

What is the greatest common monomial factor of the expression 12x^2y^3−48x^5y

Answer 1

12x^2y 
For GCF take only the common factors to the least power... .
2*2*3 x x y y y 
2*2*2*2*3 x x x x x y 
Can you see the common factors?

Answer 2

Work shown above! Greatest common monomial is 12x^2y