Помогите с системой 2 х+у=-1 внизу х^2+2 у=3

2x + y = - 1

x^2 + 2y = 3

y = - 2x - 1

x^2 + 2 (- 2x - 1) = 3*

x^2 - 4x - 5 = 0

D = 16 + 20 = 36

x1 = (4 + 6) / 2 = 10/2 = 5

x2 = (4 - 6) / 2 = - 2/2 = - 1

x1 = 5

y1 = - 2x1 - 1 = - 10 - 1 = - 11

x2 = - 1

y2 = - 2x2 - 1 = 2 - 1 = 1