Can someone please show me how to do this problem? I have the answer but do not understand the steps in order to arrive at it.
Integral 4r square root(6-r) dr
Answer: 8/5*(6-r)^5/2 - 16(6-r)^3/2 +C
Do you know integration by parts?
If not, read Integration by Parts -- from Wolfram MathWorld.
If so, use it.