Which of the following correctly completes the square for the equation below x^2+2x=13

                          x² + 2x = 13
                    x² + 2x + 1 = 13 + 1
                x² + x + x + 1 = 14
x(x) + x(1) + 1(x) + 1(1) = 14
        x(x + 1) + 1(x + 1) = 14
                (x + 1)(x + 1) = 14
                          (x + 1)² = 14
                              x + 1 = ±√14
                                    x = -1 ± √14

Cd is the perpendicular bisector of both xy and st, and cy=20.find xy