And then we just have to verify that this is going to be a minimum point. If we can find an x, it makes this thing equal to 0. So let's try to solve for x. So if we add 12.5 to both sides, we get 12.5 is equal to, if you add the x terms, you get square root of 3 over 18 plus 1 8th x. To solve for x, divide both sides by this business, you get x is equal to 12.5 over square root of 3 over 18 plus 1 over 8. And we are done. At x equals this, our derivative is equal to 0.