Dear all,

The following problem I have is this one. The transfer function of a closed loop system is

In this case the unit step response is needed. Allright, just multiply by and obtain the inverse, of course.

However, I have the solution but not the way it is obtained. The solution is stated as

and I see no way how to split up the above equation in the partial fractions over (s+10) and (s+20). Again.

Regards,

Jurgen