Mathématiques

Question

aider moi juste exo 22 assez court
aider moi juste exo 22 assez court

2 Réponse

  • Exercice 22 : 

    I = (4t - 5) (4t + 5)
    I = (4t)² - 5²
    I = 16t² - 25

    J = (7a + 4)²
    J = (7a)² + 2 X 7a X 4 + 4²
    J = 49a² + 56a + 16

    K = (5y - 1)²
    K = (5y)² - 2 X 5y X 1 + 1²
    K = 25y² - 10y + 1

    L = (1 + 3z) (1 - 3z)
    L = (3z)² - 1²
    L = 9z² - 1

  • I = (4t - 5) (4t + 5)
      (4t)² - 5²
      16t² - 25

    J = (7a + 4)²
     (7a)² + 2 X 7a X 4 + 4²
     49a² + 56a + 16


    K = (5y - 1)²
     (5y)² - 2 X 5y X 1 + 1²
     25y² - 10y + 1

    L = (1 + 3z) (1 - 3z)
    (3z)² - 1²
     9z² - 1