Learn how to find the domain from dividing two functions

The video tutorial explains the functions G(x) and F(x), where G(x) is the square root of x and F(x) is x^2 + 1. It discusses how to find the domain of a rational function by setting the denominator equal to zero and explains that the domain includes all real numbers since the denominator never equals zero for real numbers. The tutorial also covers the concept of zero and infinity in the context of rational functions.

Why can't you take the square root of a negative number in the context of this function?

What is the significance of setting the denominator equal to zero when finding the domain?