Compose two functions then determine the domain

The video tutorial explains the functions F(x) = X^2 + 4 and G(x) = sqrt(X) - 4, and how to compose them into F(G(x)). It demonstrates the simplification of F(G(x)) to X and discusses the importance of considering domain restrictions, emphasizing that the domain of the composition is restricted from 4 to infinity. The tutorial concludes with a summary of the key points covered.

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