I think you have not declared z to be complex.
By default every symbol is handled as a real value. So conjugate(z) simplifies
to z unless you declare z to be complex.
That is the result I have got:
(%i4) declare(z,complex);
(%o4) done
(%i5) solve(z*conjugate(z)+3*(z-conjugate(z))=13+12*%i,z);
(%o5) [z = (3*conjugate(z)+12*%i+13)/(conjugate(z)+3)]
Dieter Kaiser
-----Urspr?ngliche Nachricht-----
Von: maxima-bounces at math.utexas.edu [mailto:maxima-bounces at math.utexas.edu] Im
Auftrag von Agust?n Valverde
Gesendet: Dienstag, 21. Oktober 2008 18:28
An: maxima at math.utexas.edu
Betreff: [Maxima] Equation with conjugate()
Hi
I am a newbie in maxima and I have expend some hours to understand
what is wrong with the following: to the input
solve(z*conjugate(z)+3*(z-conjugate(z))=13+12*%i, z)
Maxima give sqrt(13+12*%i) as solution, but it is not correct!
Some suggestion?
Agust?n
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