I can't seem to figure out how to get the first part of this question done.
determine the intervals of increase or decrease
so I turned f(x) into derivative f'(x)=3x^2-2x+4 to try to find the critical points. using the quadratic formula to solve f'(x)=0 led me to a negative square root which I can't remember a way around and trying trial and error has lead me to further confusion. Or if anyone can tell me what to do with the square root of -44.
I have a feeling this is a simple answer and I'm just looking way too far into it, any help is appreciated!