Hullo.

The function I was trying to draw was

The first derivative is

When I come to determine Concave Up & Concave Down intervals...I calculate which is

The problem now is that I can't find zeros of this equation, neither simplify anymore! I know there are rules to solve these but they take time I think! I had this function on test! There wasn't much time to calculate...!

So if you know any shorter way...tell me, I'd appreciate!