So pause this video and try to work through it yourself and see if Pamela's work is correct. All right, well I'm just gonna try to do it again in parallel, so first let me just take the derivative here. So h prime of x, just use the power rule multiple times, is gonna be three x squared for the x to the third. Two times negative six is negative 12 or minus 12x, and the derivative of 12x is plus 12. And let's see, you can factor out a three here, so it's three times x squared minus four x plus four, and this part is indeed equal to x minus two squared, so this is equal to three times x minus two squared. So her step one looks right on target. Okay, step two, the solution of h prime of x is equal to zero is equal to x equals two.