x*y = 24
y = 4*x
-2.44948974278318
-9.79795897113271
2.44948974278318
9.79795897113271
x1 = 2.449489742783178 y1 = 9.797958971132712
x2 = -2.449489742783178 y2 = -9.797958971132712