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## Homework Statement

I need to find the Laplace transform of t*e

^{-t}*u(t-tau)

**2. Homework 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?