Question

what is the greatest common factor of 60x^4, 45x^5y^5 and 75x^3y

Answer 1

factor each
60x^4=2*2*3*5*x*x*x*x
45x^5y^5=3*3*5*x*x*x*x*x*y*y*y*y*y
75x^3y=3*5*5*x*x*x*y

common is 3*5*x*x*x=15x^3

gcf=15x^3