Domain of a rational function with discontinuities

The video tutorial discusses rational functions, emphasizing the importance of not simplifying fractions incorrectly. It explains how to identify restrictions in the domain by setting the denominator equal to zero and solving for the values that make it undefined. The tutorial also covers graphing these restrictions on a number line and writing the domain in interval notation.

Describe how to express the domain of a function with discontinuities.

What intervals represent the domain of the function discussed in the text?