Dear all,

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

$\displaystyle 10 \over {s^2 + 2s + 20}$

In this case the unit step response is needed. Allright, just multiply by $\displaystyle 1 \over s$ and obtain the inverse, of course.

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

$\displaystyle Y(s) = {0.12 \over s} - {0.24 \over {s + 10}} + {0.12 \over {s + 20}}$

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