What are the common factors of 3x3y, 5xy2 and 15xy ?
x, y, xy
We can write the given terms as follows
3x3y=3×x×x×x×y
5xy2=5×x×y×y
15xy=15×x×y
The common irreducible factors in all three terms are x and y.
So, the common factors of the given expressions are x, y and xy.