# Finding the Greatest Common Factor of Variable Expressions

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

- Identifying Common Factors
- Listing all the Factors of a Whole Number
- Finding the Greatest Common Factor of 2 or 3 Numbers (no variables)

## Examples

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.

## Practice

The examples above give instructions on how to input your answers.