Re: two quadratic eq, please help

[Paul Thomas]

> >   highly appreciate anyone can tell me how (or hint) to use octave to
> > solve:(12-x)^2 + y^2 =15^2, (16+y)^2+x^2=25^2 (by programming or using 
> > its built
> > in function)?

Are these to be solved simultaneously?  If so, there are two real solutions 
possible (ie both intersections of the two circles);

> From (i)   y = +/- ( 15^2 - (12-x)^2 ) ^0.5
=>    (ii) (16 +/- ( 15^2 - (12-x)^2 )^0.5 )^2 + x^2 = 25^2

Then solve both of these roots with fsolve.

Paul T





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