So we know that f of a is going to be equal to g of a, or another way, in the last section, we talked about the absolute value of f of x minus g of x, which we've already inputted into our calculator and saved it. We could also say that the absolute value of f of a minus g of a is equal to zero. And you don't need the absolute value there, because obviously the absolute value of zero is going to be zero, but we've already inputted this into our calculator, so it's going to be useful. So we can solve that thing we inputted into our calculator. When does that equal zero? And actually, let's just do that right from the get-go. So in our calculator, we already inputted right over, let's make sure it's on.