Question 507615
Try these sites 

http://www.wtamu.edu/academic/anns/mps/math/mathlab/int_algebra/int_alg_tut39_simrad.htm

http://hotmath.com/help/gt/genericalg1/section_8_1.html

http://www.algebralab.org/lessons/lesson.aspx?file=algebra_radical_simplify.xml

http://www.youtube.com/watch?v=hclSMThq8yE

http://www.youtube.com/watch?v=h5XXu1tijXo&feature=relmfu

http://www.youtube.com/watch?v=WTMIU7t3BZY&feature=related

And there are other youtube videos on that.

Edwin</pre>