And so this is going to be equal to, well if I have a plus b times a minus b, I'm gonna get a difference of squares. So it's gonna be square root of x squared, which is, let me just write it, it's gonna be square root of x squared minus four over, well square root of x squared is just going to be x minus four. So let me rewrite it that way. So it's x minus four over x minus four times square root of x plus two. Square root of x plus two. Well this was useful because now I can cancel out x equals four, or x minus four, right over here. And once again, if I wanted it mathematically to be the exact same expression, I would say well, now this is going to be equal to one over the square root of x plus two for x does not equal four.