# Finding the Greatest Common Factor of Variable Expressions

Not quite ready for this web exercise? Try these first:

## Examples

Question: Find the greatest common factor of $\,6x\,$ and $\,8xy\,.$
Answer: $2x$
Question: Find the greatest common factor of $\,3x^2y\,$ and $\,5x^2y^2\,.$
Answer: $x^2y$

Note:  In the web exercise below, you would input this answer as   x^2y . Notice that exponents are input using the ‘ ^ ’ key.

Variables must be input in the order they appear in the first expression, going from left to right. For example, even though  yx^2  is a correct answer, it is not recognized as correct.