Can anyone tell me here how to simplify the following result obtained with maxima? h(s):=(1+r*c*s)/(1+r*c*s+l*c*s^2); s:%i*sqrt(sqrt(l^2+2*c*l*r^2)/l-1)/(r*c); abs(h(s)); (answer 3 times positive to questions) I'd like to see a simplified version of abs(h(s)), can anyone here show how to proceed? regards, hugo