Find estimates for the solutions of the equation x^2 + 2x + 1 = 0
x^2 + 2x + 1 = 0 factor as
(x + 1) ( x + 1) = 0
(x + 1)^2 = 0 take the square root of both sides
x + 1 = 0 subtract 1 from both sides
x = -1
