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April 25, 2015

Homework Help: Algebra

Posted by Amelie on Sunday, September 13, 2009 at 4:36pm.

I need to rationalize the denominator of 2/3 square root of five, (three being the index). My book suggests you should multiply this by 3 square root of 5^2 over 3 square root of 5^2. I thought the numbers that you rationalize the original with should be the denominator unaltered. Why do you add a ^2 to the 5? Thanks for your help!!!

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