Lesson: Simplifying Rational Expressions

Rate this video: 

Comment on Simplifying Rational Expressions

Hi Brent,

I like the approach of testing values! When can I use this approach in particular please.

Thank you for your advice
Best Regards
gmat-admin's picture

Great question!
Here's an article I wrote that specifically addresses that question: http://www.gmatprepnow.com/articles/data-sufficiency-when-plug-values


Add a comment

Tweet about our course!

If you're enjoying our video course, help spread the word on Twitter.

Change Playback Speed

You have the option of watching our videos at various speeds (25% faster, 50% faster, etc). To change the playback speed, click the settings icon on the right side of the video status bar.

Have a question about this video?

Post your question in the Comment section below, and we’ll answer it as fast as humanly possible.

Free “Question of the Day” emails!