Question

Gcf 60x^4y^7, 45x^5y^5 and 75x^3y

Answer 1

Steps:

What do all of these have in common?
 ~ all of the leading coefficients are divisible by 5
 ~ all have at least 3 x's
 ~ all have at least 1 y

Now all we have to do is pull those out:

answer: 5x^3y