Question

Aflați numerele întregi x si y pentru care (x+1)(y-2)=3​

Answer 1

Răspuns:

(x + 1)(y - 2) = 3​

1x3 = 3

3x1 = 3

-1x-3 = 3

-3x-1 = 3

x+1 = 1 => x = 1-1 => x = 0

y-2 = 3 => y = 3+2 => y = 5

x+1 = 3 => x = 3-1 => x = 2

y-2 = 1 => y = 1+2 => y = 3

x+1 = - 1 => x = -1-1 => x = -2

y-2 = - 3 => y = - 3+2 => y = -1

x+1 = - 3 => x = -3-1 => x = -4

y-2 = -1 => x = -1+2 => y = 1