Combining Like Radicals

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem. You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

Evaluate: 3 root 7 plus 2 root 7
Evaluate: 4 root 5 minus 3 root 5
Simplify: 2 root x minus 3 root x
Evaluate: root 3 + root 27
Evaluate: root 45 minus root 20 + root 80
Simplify: the cube root of 24x minus the cube root of 81x
Evaluate: left paren root 5 + root 7 right paren, left paren root 5 minus root 7 right paren
Evaluate: left paren 2 minus 3 root 5 right paren, left paren 3 minus 4 root 5 right paren