How to find the domain of a rational function - domain and range

The video tutorial explains how to determine the domain of functions, focusing on rational functions and quadratic expressions. It begins by defining the domain and its importance in functions, using examples to illustrate when an input does not yield an output. The tutorial then delves into solving domain issues in rational functions by identifying values that make the denominator zero. It further explores quadratic expressions, explaining the process of factoring to find values that result in zero. The video concludes by summarizing the steps to determine the domain, emphasizing the importance of identifying values that make the denominator zero.

What are the values of X that make the quadratic equation X^2 + 8X + 15 = 0?

Describe the process of factoring the quadratic equation mentioned in the text.