Question 1121521
You might want to find y-axis intercept by solving for f(x)=0.  That would be (0, 10).


Take first and second derivatives of f(x).  The first derivative will help identifying any maximum or minimum points  (where slope of f would be 0).  Seeing the sign on leading term for f, you should be able to figure out which is the max and which is the min.


That was just suggested guidance, not actually the answer or solution.