Bonjour,

1) 3 + 2 = 5 → 5² = 25 → 25 - 3² = 25 - 9 = 16

2) - 2 + 2 = 0 → 0² = 0 → 0 - (-2)² = 0 - 4 = - 4

3) 1 + 2 = 3 → 3² = 9 → 9 - 1² = 9 - 1 = 8

4) Les nombres obtenus sont tous multiples de 4

4 × 4 = 16

4 × -1 = -4

4 × 2 = 8