Factoriser 4 x 8 x 4 9 x Slides: 35 Download presentation Factoriser 4 x² + 8 x + 4 = ? 9 x² – 6 x + 1 = ? 16 x² – 1 = ? Calcul 1 4 x² – 4 x + 1 Calcul 2 4 – x² Calcul 3 x² + 12 x + 36 Calcul 4 36 – x² Prêt pour la correction… Calcul 1 4 x² – 4 x + 1 Calcul 1 4 x² – 4 x + 1 = (2 x)² – 2 x 2 x + 1² Calcul 1 a = 2 x et b = 1 4 x² – 4 x + 1 = (2 x)² – 2 x 2 x + 1² a² – 2 x ab + b² Calcul 1 a = 2 x et b = 1 4 x² – 4 x + 1 = (2 x)² – 2 x 2 x + 1² a² – 2 x ab + b² Calcul 1 a = 2 x et b = 1 4 x² – 4 x + 1 = (2 x)² – 2 x 2 x + 1² a² – 2 x ab + b² (a – b)² Calcul 1 a = 2 x et b = 1 4 x² – 4 x + 1 = (2 x)² – 2 x 2 x + 1² (a – b)² Calcul 2 4 – x² Calcul 2 4 – x² = 2² – x² Calcul 2 a = 2 et b = x 4 – x² = 2² – x² a² – b² Calcul 2 a = 2 et b = x 4 – x² = 2² – x² a² – b² Calcul 2 a = 2 et b = x 4 – x² = 2² – x² (a – b)(a + b) Calcul 3 x² + 12 x + 36 Calcul 3 x² + 12 x + 36 = x² + 2 x 6 x + 6² Calcul 3 a = x et b = 6 x² + 12 x + 36 = x² + 2 x 6 x + 6² a² + 2 x ab + b² Calcul 3 a = x et b = 6 x² + 12 x + 36 = x² + 2 x 6 x + 6² a² + 2 x ab + b² Calcul 3 a = x et b = 6 x² + 12 x + 36 = x² + 2 x 6 x + 6² a² + 2 x ab + b² (a + b)² Calcul 3 a = x et b = 6 x² + 12 x + 36 = x² + 2 x 6 x + 6² (a + b)² Calcul 3 a = x et b = 6 x² + 12 x + 36 = x² + 2 x 6 x + 6² = (x + 6)² (a + b)² Calcul 4 36 – x² Calcul 4 36 – x² = 6² – x² Calcul 4 a = 6 et b = x 36 – x² = 6² – x² a² – b² Calcul 4 a = 6 et b = x 36 – x² = 6² – x² a² – b² Calcul 4 a = 6 et b = x 36 – x² = 6² – x² (a + b)(a – b)