Hello, i would like to know what is the complex conjugate of :

(a*c*d)×( (-e*d+i)/(1-e*c*d^2) )

Thanks for your help.

(a*c*d)×(-e*d+i)/(1-e*c*d^2)

= acd/(1-ecd^2) (-ed+i)

since the conjugate of a+bi is a-bi, you will get

acd/(1-ecd^2) (-ed-i)

Looks like you're not going to get where you want to...