Find the value c that completes the square, x^2 - 4x + c

The video tutorial explains the process of completing the square in quadratic equations. It begins with an introduction to the concept and its purpose, followed by a detailed explanation of the steps involved. The instructor provides an example to demonstrate the process, emphasizing the importance of following the order of operations. Finally, the tutorial covers how to factor the completed square into a binomial squared, preparing students for further learning in the next class.

Describe the significance of the vertex form of a quadratic equation in relation to completing the square.

What steps should be followed to rewrite a quadratic expression in the form of a binomial squared?