Question

Решите систему неравенсв
{x-y=1

{xy=6

Answer 1

x-y=1
xy=6

x=y+1
y(y+1)=6

x=y+1
y^2+y-6=0

x=y+1
y^2+3y-2y-6=0

x=y+1
y(y+3)-2(y+3)=0

x=y+1
(y-2)(y+3)=0

x=y+1
  y=2
  y=-3

y=2
x=3

y=-3
x=-2