Domain of a simple rational function in interval and set notation

The video tutorial explains how to handle mathematical restrictions involving radicals and denominators. It emphasizes that denominators cannot be zero and introduces interval notation to represent all real numbers except specific values. The tutorial also covers preferred methods for writing domain notation, focusing on non-inclusion and union connections.

How would you express the domain of all real numbers except for -2 in interval notation?

What is the preferred method of writing domain notation as discussed in the text?