**Assume all variables are positive.**)

**Perform the operations.**

Be sure to follow the correct order of operations.

**Simplify.**

Unsimplified rational expressions may look as if they have no like terms, but first try simplifying and then check for like terms.

Simplifying is a challenge for many students. In particular, the numerical part is the source of confusion. It is much easier to deal with the prime factors of the number in a radical than it is with the number itself. Create a factor tree and determine the prime factorization of all numbers before simplifying radical expressions.

**Simplify:**

Begin by determining the prime factorizations of 108 and 864.

Substitute the prime factorization in and then simplify.

**Simplify.**

**Video Examples on YouTube:**

J. Redden on G+