complex analysis problem in mathematica 3.0

*To*: mathgroup at smc.vnet.net*Subject*: [mg48459] complex analysis problem in mathematica 3.0*From*: BranasMan <branasREmoVe at mail.inet.hr>*Date*: Mon, 31 May 2004 00:13:36 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

i have a complex function: H(s)=1 / (s^3 + 2s^2 + 2s + 1) whan i replace "s" with j*w (j=sqrt(-1)) i get: H=1 / (1 + j2w -2w^2 - jw^3) i would like to get that function in shape of : H=something + j*something_else i.e. the complex and real part apart. i played with Re and Im,but it seems that the fact that "w" is a variable confuses mathematica?! i would reeeealy appreciate any help,and maybe perhaps some links for me to learn to use mathematica better.