Algebra 2 - Addition of two linear functions, f(x) = x + 5; g(x) = x-4. Find (f+g)(x)

The video tutorial explains how to combine two functions, F of X and G of X, by adding them together. The instructor guides students through the process of adding the functions, simplifying the expression, and deriving the final result, which is 2X plus one. The tutorial emphasizes the importance of combining like terms and using parentheses appropriately.

Explain the importance of using parentheses when adding functions.

What are the steps to simplify the expression after combining like terms?