Answer:
x = -3.45 or +1.45
Step-by-step explanation:
To complete the square, add the square of half the x-coefficient to both sides of the equation.
x^2 +2x = 5
x^2 + 2x + 1 = 6
(x +1)^2 = 6 . . . . . . it can be helpful to write the left side as a square
x +1 = ±√6 . . . . . . . take the square root; next subtract 1
x = -1 ±√6 = {-3.45, 1.45}
