Learn How To Find the Value of the Composition of Two Functions

The video tutorial explains how to evaluate a function at a specific point and use the result in a composite function. The teacher demonstrates calculating F of two, which results in negative four, and then substitutes this result into another function, G, to find G of negative four. The final result is negative four-fifths. The tutorial emphasizes understanding the substitution process in composite functions.

Discuss the significance of replacing F of two with -4 in the context of the problem.

What does the teacher imply about the necessity of doing math in this problem?