1 minus 2, you're going to get negative numbers. So when x is less than 2 thirds, this thing right here is going to be negative. So the second derivative, if x is less than 2 thirds, the second derivative right to the left, or right when you go less than 2 thirds, the second derivative of x is less than 0. Now the fact that we have this transition from when we're less than 2 thirds, we have a negative second derivative, and when we're greater than 2 thirds, we have a positive second derivative, that tells us that this indeed is an inflection point. That x is equal to 2 thirds is definitely an inflection point for our original function up here. Now we have one more candidate inflection point, and then we're ready to graph. Then once you know all the inflection points and the maximum and minimum, you are ready to graph the function.