1. The problem statement, all variables and given/known data see attachment 2. Relevant equations 3. The attempt at a solution I don't get the part where it says "Solving this equation for X(s), we obtain ..." Specifically jumping from 3/s(s2+3s+5) to (3/5)(1/s)-(3/5)[(s+2)/(s2+2s+5)]. How did the problem break up this fraction into separate subtracting fractions?? Is there a trick or something? I'm completely lost here. Thanks.