So let me do our little test here. Let me draw a line so we don't get confused with all of the stuff that I wrote here. So when x is greater than 0, what's happening to the second derivative? Remember, the second derivative was equal to 12x times 3x minus 2. I like writing it this way because you've kind of decomposed it into two linear expressions, and you can see whether each of them are positive or negative. So if x is greater than 0, this thing right here is definitely going to be positive. And then this thing right here, right when you go right above x is greater than 0.