Calc Nibble: The Evil Problem 4.1.39
From Alan Fahrner
How do you find the critical values for f(x) = xsqrt(x-a), where "a" is a constant. (What is/are the general critical point value(s)?)
I don't do the problem for you, but I give you hints on how to figure it out. Be sure to first try it yourself, only watching the video if you run into a wall or solve it and want another perspective on how to approach it.