Using the square root method to solve a quadratic equation

The video tutorial explains how to solve a quadratic equation by setting it to zero and using the square root method. It also introduces an alternative method of factoring when the coefficient 'a' is not equal to 1. The tutorial covers the process of solving for x and discusses the importance of understanding different methods for solving quadratic equations.

What is the significance of setting the equation equal to 0 in solving quadratic equations?

How do you determine the two numbers that multiply to give 400 and add to give 0?