Domain of rational function by graphing

The video tutorial covers rational functions, emphasizing the importance of the denominator not being zero. It explains how to find the domain by identifying values that make the denominator zero. The tutorial revisits Algebra 2 concepts, focusing on factoring quadratics to solve equations. It demonstrates solving a perfect square trinomial and discusses different methods like the zero product property and square root method. Finally, it shows how to represent the domain using interval notation, highlighting that the domain excludes values making the denominator zero.

Explain the process of factoring a perfect square trinomial.

What does it mean when we say the domain is all other numbers except a certain value?