November 27, 2015

Homework Help: Surds

Posted by Gingie on Friday, July 11, 2014 at 6:48pm.

Solve in the exact form.

(sqrt of 4x+1)+(sqrt of x+1)=2

Someone showed me to do this next:
Square both
4x+1+2((sqrt of 4x+1)(sqrt of x+1))=4
I do not understand where the 2 come from ..and why do we need to multiply the sqrt of 4x+1 and sqrt of x+1 together to get the product.......??????????

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