I'm trying to solve system of equations for c: z=z^4+2*c*z^2+c^2+c abs(4*z^3+4*c*z)=%e^%i It should have 1 complex solution. I have tried : algsys([z=z^4+2*c*z^2+c^2+c, abs(4*z^3+4*c*z)=%e^%i], [c]); gives no solutions. Is it possible in Maxima ? Adam