Well, the second derivative is just a quadratic expression here which would be defined for any x, so it's not gonna be undefined anywhere. So interesting points where we could transition from going from a negative to a positive or a positive to a negative second derivative is where this thing could be equal to zero. So let's figure that out. So let's figure out where negative 12x plus 12 could be equal to zero. See, we could subtract 12 from both sides, and we get negative 12x squared is equal to negative 12. Divide both sides by negative 12, you get x squared is equal to one, or x could be equal to the plus or minus, or x could be equal to the plus or minus square root of one, which is, of course, just one. So the second derivative at plus or minus one is equal to zero.