(2х-1)(y+2)=0
x^2-4x+y= -5
2x-1=0 или y+2=0
x=1/2 y=-2
(1/2)^2-4*(1/2)+y=-5 x^2-4x-2=-5
1/4 -2 +y = -5 x^2-4x+3=0
y=-3,25 x1=3 и x2=1
(3; -3,25), (1; -3,25)
(2х-1)(y+2)=0
x^2-4x+y= -5
2x-1=0 или y+2=0
x=1/2 y=-2
(1/2)^2-4*(1/2)+y=-5 x^2-4x-2=-5
1/4 -2 +y = -5 x^2-4x+3=0
y=-3,25 x1=3 и x2=1
(3; -3,25), (1; -3,25)