1. The problem statement, all variables and given/known data How do I solve the following differential equation with the Laplace Transform:? f(t)'' - a*f(t) = 0 (all ICs are equal to zero). 2. Relevant equations 3. The attempt at a solution So, I get something like F(s)*(s^2 - a) = 0. I don't know where to go from there.