Question Bank  Number of Integral/Positive/NonNegative Solutions  Set 1

x^2 + y^2  xy = x + y
(x  y)^2 + (x 1)^2 + (y 1)^2 = 2
(0,0) (0,1) (1,0) (2,2) (1,2) (2,1)
6 integral solutions
3 positive integer solutions
[credits : @Raman_Sharma]