Re: expressing a matlab statement

[Rolf Fabian]

Ben Abbott wrote:
> 
> 
> Matlab/Octave are computational applications. Assuming I got the  
> algebra correct,
> 
> y1 = 1 + sqrt(1 + 4*(1+x));
> y2 = 1 - sqrt(1 + 4*(1+x));
> y = union(y1,y2);
> 
> If  you're looking for a program that will provide a symbolic solution  
> (i.e. start with y^2-2y=x+1 and provide an equation representing y),  
> take a look at Maxima.
> 
> http://maxima.sourceforge.net/
> 
> Ben
> 

Ben

IMHO and also from a pedagogical point of view the worst thing to do
is to provide beginners with all-embracing answers.

Fortunately your presented result is that far off from the algebraical
correct result that the questioner still has the chance to improve
his/her calculational skills by solving it alone.

rf



-----
Rolf Fabian
<r dot fabian at jacobs-university dot de>

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