To answer this question we will factorize each term.
Notice that:
[tex]20x^4y=5xy(4x^3),[/tex][tex]10x^3y^3=5xy(2x^2y^2),[/tex][tex]5xy^2=5xy(y).[/tex]
Therefore, the greatest common factor of the terms is:
[tex]5xy\text{.}[/tex]
Answer:
[tex]5xy\text{.}[/tex]
