How to add two functions and evaluate for a given value

The video tutorial explains how to combine two functions, F(x) and G(x), by adding them together. It discusses the notation F + G of X and emphasizes that the functions cannot be combined if they are not like terms. The tutorial also covers how to determine the domain of the combined function, highlighting that the domain is all values of X greater than or equal to -1. Finally, it demonstrates evaluating the combined function for a specific input, noting the use of imaginary numbers when the input is outside the domain.

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