Identits remarquables Carr dune diffrence x x 6
Identités remarquables Carré d’une différence (x – …)² = x² – 6 x + … … – … + 4 = (2 x – …)²
Calcul 1 (…x. . 1)² = 16 x² – 8 x + 1
Calcul 2 81 x² – 18 x + 1 =(…x. . …)²
Calcul 3 (3 y. . 2)² = …y² – 12 x + 4
Prêt pour la correction…
Calcul 1 (…x. . 1)² = 16 x² – 8 x + 1
Calcul 1 (a - b)² = a² - 2 ab + b² (…x. . 1)² = (4 x)² – 2 x 4 x x 1 + 1² a = a et b = 7
Calcul 1 (a - b)² = a² - 2 ab + b² (…x. . 1)² = (4 x)² – 2 x 4 x x 1 + 1² a = 4 x et b = 1
Calcul 1 (a - b)² = a² - 2 ab + b² (4 x - 1)² = 16 x² – 8 x + 1 a = 4 x et b = 1
Calcul 2 81 x² – 18 x + 1 =(…x. . …)²
Calcul 2 a² - 2 ab + b² = (a - b)² 81 x² – 18 x + 1 =(9 x - 1)² a = 9 x et b = 1
Calcul 3 (3 y. . 2)² = …y² – 12 x + 4
Calcul 3 (a - b)² = a² - 2 ab + b² (3 y. . 2)² = …y² – 12 x + 4 a = a et b = 7
Calcul 3 (a - b)² = a² - 2 ab + b² (3 y. . 2)² = …y² – 12 x + 4 a = a et b = 7
Calcul 3 (a - b)² = a² - 2 ab + b² (3 y. . 2)² = …y² – 12 x + 4 Impossible
1. (4 x – 1)² = 16 x² – 8 x + 1 2. 81 x² – 18 x + 1 =(9 x – 1)² 1. 3. (3 y. . 2)² = …y² – 12 x + 4 2. Impossible
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