Question

Determinați perechile de numere întregi (x ; y) , stiind ca xy+3x=-5

Answer 1

xy+3x=-5
x (y+3)=-5

x=1
y+3=-5, y=-8

x=-1
y+3=5, y=2

x=5
y+3=-1, y=-4

x=-5
y+3=1, y=-2

S={(1,-8), (-1, 2), (5,-4), (-5,-2)}