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## Homework Statement

I am trying to do some revision for an upcoming exam and one question I am trying to figure out is

Use the second shifting theorem to find the Laplace transfrom of the following function:

f(t) = t

^{2}, t < 4

t, t ≥ 4

## Homework Equations

## The Attempt at a Solution

I just don't understand how to get from the question to

f(t) = t

^{2}[1 - u(t-4)] + tu(t-4)

I am really struggling with applying the second shifting theorem to express in terms of the unit step function I am failing to see how it works because nothing is explained in basic detail?