How to subtract two linear functions then determine the domain

The video tutorial emphasizes the importance of using parentheses in mathematical expressions, particularly in subtraction. It explains how failing to use parentheses can lead to incorrect results, using examples to illustrate the point. The tutorial also covers the process of combining like terms and rewriting expressions in descending order. Additionally, it discusses the domain of functions, highlighting that the domain remains all real numbers when subtracting functions, due to the understanding of parent functions.

Why is it important to use parentheses when subtracting functions?

What happens if you do not use parentheses in the expression 1 - X^2?

Describe the distributive property in the context of subtracting functions.

Explain how to combine like terms after performing the subtraction of two functions.

What is the domain of the resulting function after subtracting two quadratic functions?