Expanding the Equation of a Circle: Finding the Center and Radius

The video tutorial explains the general equation of a circle and demonstrates how to expand it using the grid or foil method. It covers rearranging the equation, substituting variables, and condensing terms to a single numerical value. The tutorial also explains how to calculate the center and radius of a circle from the expanded form and provides an example problem to illustrate these concepts.

What is the significance of the constant C in the equation of a circle?

How can you compare the expanded form of a circle's equation to its factorized form?

Describe how to calculate the radius of a circle from its expanded equation.