And this has the exact same domain now, now that we've put this constraint in, as g of x. Now you might say, okay, well, how does this help us? Because we want to find the limit as x approaches negative one. And even here, I had to put this little constraint here that x cannot be equal to negative one. How do we think about this limit? Well, lucky for us, we know, lucky for us, we know that if we just take another function, f of x, if we say f of x is equal to the square root of x plus five plus two, well, then we know that f of x is equal to g of x for all x not equal to negative one, because f of x does not have that constraint. And we know if this is true of two, if this is true of two functions, then the limit as x approaches, the limit, let me write this down, is since we know this, because of this, we know that the limit of f of x as x approaches negative one is going to be equal to the limit of g of x as x approaches negative one.