Solving Simple Quadratic Equations (x+3)^2=9 practice before completing the square! Use this to lead into completing the square! I have found that many students struggle to solve simple quadratic equations before learning how to complete the square. This should help students build basic skills before learning to complete the square. #1-18 are in the form (x+3)^2=9, #19-36 are in the form (x+3)^2-5=9. Some answers are rational, others are irrational and some must be simplified. Answer key is included. See separate listing for the form 4(x+3)^2-1=9.