POLQ 2 | Lesson 2 | Watch (Application of Completing the Square)

Completing the square is used to find the radius and center of circles. The standard form for a circle is \(ax^2 + by^2 + cx + dy + e =0\). To find the radius and center of the circle the equation will need to be in the form \((x-h)^2 + (y-k)^2 = r^2\) where center is (\(h,k\)) and the radius is \(r\).

Use this link to watch the video to help with the next task:

Features of a circle from its expanded equation | Khan Academy


 

Go to Practice (Application of Completing the Square)