Bonjour,
√4 = √(2 × 2) = 2
√36 = √(6 × 6) = 6
√11² = 11 (un carré annule une racine)
√(-5)² = √25 = √(5 × 5) = 5
2√9 = 2 × √(3 × 3) = 2 × 3 = 6
3√16 = 3√(4 × 4) = 3 × 4 = 12
2 + √25 = 2 + √(5 × 5) = 2 + 5 = 7
√144 - 6 = √(12 × 12) - 6 = 12 - 6 = 6
