Bonjour,
√121 = 11 car 11 × 11 = 121
√144 = 12 car 12 × 12 = 144
√16² = 16 car un carré et une racine carrée s'annulent
√0 = 0 car 0 × 0 = 0
√π × √π = π car (√π)² = π
