Question 571074
Try this site:

http://tutorial.math.lamar.edu/Classes/Alg/RationalExpressions.aspx

Also try these youtube videos:

http://www.youtube.com/watch?v=L1KD-C0lWsY

http://www.youtube.com/watch?v=f7WjJ_Zg7VY&feature=related

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

Edwin</pre>