x*y = 3
x - y = 5
-0.54138126514911
-5.54138126514911
5.54138126514911
0.54138126514911
x1 = 5.54138126514911 y1 = 0.5413812651491098
x2 = -0.5413812651491098 y2 = -5.54138126514911