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From: "Song Joo " <song-lee@northwestern.edu>
Newsgroups: comp.soft-sys.matlab
Subject: Re: solve equation
Date: Fri, 5 Dec 2008 17:02:02 +0000 (UTC)
Organization: Northwestern University
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I ended up to go back to your other suggestion.-moreless manually solving with one unknown variable. The other question is this,
Then the solution is,
i*(((17*17797387353769591822856140666864759^(1/2))/4503599627370496000 - 1945982880988654689/22517998136852480000)^2 - 289/2500)^(1/2) + 7744119703248663/18014398509481984
 7744119703248663/18014398509481984 - i*(((17*17797387353769591822856140666864759^(1/2))/4503599627370496000 - 1945982880988654689/22517998136852480000)^2 - 289/2500)^(1/2)
 
Which is supposed to be two simple values but i don't know why matlab format gives me these ridiculous numbers as solutions.

When I recopy this value , then it will give me simple solutions as 

ans =

    0.6716


ans =

    0.1882

Does anyone know matlab command to simply these complex formats? 

Thanks in advance,
SongJoo


"Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid> wrote in message <gha0ta$9lg$1@fred.mathworks.com>...
> "Song Joo " <song-lee@northwestern.edu> wrote in message <gh9vrh$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