Question

Cate perechi de numere intregi (x;y) verifica egalitatea |x-2|+|y+2|=1 ?

Answer 1

1.
x-2=-1
y+2=0       x=1 , y=-2
2.
x-2=0
y+2=1      x=2 , y=-1
3.
x-2=1
y+2=0      x=3  , y=-2
4.
y-2=-1
x-2=0        x=2 , y=1
4 perechi