1. The problem statement, all variables and given/known data I need to find the Laplace transform of t*e-t*u(t-tau) 2. Relevant equations and attempt at solution I know the general form of the transform, but my problem is in the time shift of the step function. If both parts of the expression were (t-tau), then I could just pull out an e(s*tau), but I have no idea what I'm supposed to do when one part has it and the other does not. Can anyone help get me started?