For this case, we have by definition the greatest common factor or GFC is given by the greatest factor that divides two numbers. For example:
12 is divisible by 1,2,3,4,6,12
16 is divisible by 1,2,4,8,16
So the GFC of 12 and 16 is 4
Now, if we have:
![x ^ 2y\ and\ xy ^ 2](https://img.qammunity.org/2020/formulas/mathematics/high-school/7a5gtwdfl3y9xpbh6lb09om94d0rr0ode8.png)
The greatest common factor of both expressions is xy.
![xy (x) = x ^ 2y\\xy (y) = xy ^ 2](https://img.qammunity.org/2020/formulas/mathematics/high-school/ft0wlhvuk94qyg3wc0tggzcayb8iuv4t77.png)
Answer:
![xy](https://img.qammunity.org/2020/formulas/mathematics/high-school/1kmwty104i3tcatq9d7wbz83ezrkej0yvn.png)
Option D