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Subject: Re: solve equation
Date: Fri, 5 Dec 2008 01:42:02 +0000 (UTC)
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"Song Joo " <song-lee@northwestern.edu> wrote in message <gh9vrh$jim$1@fred.mathworks.com>...
> I did this way
> [x2,y2]=solve('a^2-(x3-x2)^2-(y3-y2)^2=0',' b^2-(x2-x1)^2-(y2-y1)^2=0')
> and others are known. ........
 
  You need to specify what your unknowns are in the 'solve' function.  It has no way of determining that 'x2' and 'y2' are to be regarded as the unknowns.  See the Matlab guide for the symbolic toolbox.

Roger Stafford