Khan Academy
Khan Academy: Algebra: Adding and Simplifying Radicals
Video showing how to add radicals and then simplify the results. [4:41]
Khan Academy
Khan Academy: Algebra: Multiply and Simplify Radical Expressions Part 1
Video showing how to multiply radicals and then simplify the results by using fractional exponents and the rules of exponents. [4:25]
Khan Academy
Khan Academy: Algebra: Subtracting and Simplifying Radicals
This resource explains how to subtract radicals and then simplify the results. [5:45]