El profesor se sorprenderá mucho al ver tu solución correcta😉
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(0)^2 - 4 * (-2) * (2) = 16
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
x1 = -1.0
x2 = 1.0
x3 = 1.0 - 1.47194975295652e-17*i
x4 = 1.00000000000024 - 5.11807934893169e-13*i
x5 = 1.0 - 7.34230992648723e-16*i
x6 = -1.0 + 4.06521773899487e-16*i
x7 = 1.00000000000001 - 2.29357658304174e-14*i
x8 = 1.0 - 1.18366876199835e-19*i
x9 = -1.0 + 1.35175819520003e-14*i
x10 = -1.00000000000015 + 3.17331468384823e-13*i
x11 = -1.0 + 7.37283988973141e-18*i
x11 = -1.0 + 7.37283988973141e-18*i