Hello everyone. I think Pierre-Simon Laplace is alive and well and he is trying to kill me, or drive me mad. I am trying to solve the attached problem. It is a differential equation---D2x+Dx-2*x=5*e^(-t)*sin(t). I have repeatedly tried to solve this problem. I don't like asking for help with homework, but I desperately want to know what I am doing wrong. I would like to think that the book has the wrong answer (it has happened before). Unfortunately, I don't have access to my MATLab, right now---I don't know why. So, I can't check it. The problem, and one of my several attempts at the solution, are attached. I hope you can help me see my error(s).