1. ## Integration Ques

I need to integrate the following but am unsure how to do it:

$
x(3-x)^{100}
$

Can I multiply the outside x into it?

I need to integrate the following but am unsure how to do it:
$
x(3-x)^{100}
$
Let $u=3-x$ and get $(3-u)u^{100}(-du)$