1. The problem statement, all variables and given/known data f"(t)-f'(t)-2f(t)=12H0(t-3), f(0)=f'(0)=0 relevant equations, are the laplace transform equations.. H0(t-a)=e-as/s 3. The attempt at a solution LT:s2F(s)-sF(s)-2F(s)=12e-3s/s =>F(s)=12e-3s/s(s+1)(s-2) ok now from here, im lost, i cant do partial fractions can I? and i need to solve for f(t) which is inverse laplace of F(s), please can someone help me out, because im not sure if can just take the inv laplace of that. please.