Use the video links for more examples of this method.
http://www.khanacademy.org/math/algebra/quadratics/completing_the_square/v/solving-quadratic-equations-by-completing-the-square
https://www.youtube.com/watch?v=xGOQYTo9AKY
https://www.youtube.com/watch?v=zKV5ZqYIAMQ
http://www.regentsprep.org/regents/math/algtrig/ate12/completesqlesson.htm
HW: Complete the WS Puzzle (1 - 14)