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June 16th, 2013, 02:09 PM  #1 
Newbie Joined: Apr 2013 Posts: 5 Thanks: 0  Equation with 3 radicals
Hi I'm having an issue when it comes to solving this equation. ?(x + 2) + ?(x  3) = ?(3x  4) I start by squaring, but I don't really know how to multiply 2 radical binomials, ?(x +2) * ?(x  3) and I can't find any information about it. 
June 16th, 2013, 03:08 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: Equation with 3 radicals
You can use the property . You will obviously have to square two times, and then you'll want to make sure no extraneous solutions were introduced, so check ALL of the solutions you obtain in the original equation by substitution. 
June 16th, 2013, 03:47 PM  #3  
Global Moderator Joined: Dec 2006 Posts: 20,931 Thanks: 2207  Quote:
 
June 16th, 2013, 05:06 PM  #4  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Equation with 3 radicals Quote:
"squaring twice" means: 4ab = (c  a  b)^2  

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