Mathématiques

Question

Aidez moi svp
Développer les expressions suivantes:
C(x)=(5x-3)(5x+3)-(x-2) au carré
D(x)=(5x+1)au carré-(2x-3)au carré

2 Réponse

  • (5x - 3)(5x + 3) - (x - 2)²
    = 25x² - 9 - (x² - 4x + 4)
    = 25x² - 9 - x² + 4x - 4
    = 24x² + 4x - 13

    (5x + 1)² - (2x - 3)²
    = 25x² + 10x + 1 - (4x² - 12x + 9)
    = 25x² + 10x + 1 - 4x² + 12x - 9
    = 21x² + 22x - 8
  • Bonsoir


    C(x)=(5x-3)(5x+3)-(x-2)²

    C(x) = (5x)² - 3² - (x² - 4x + 4)

    C(x) = 25x² - 9 - x² + 4x - 4

    C(x) = 25x² - x² + 4x - 9 - 4

    C(x) = 24x² + 4x - 13


    D(x) = (5x+1)² - (2x-3)²

    D(x) = (25x² + 10x + 1) - (4x² - 12x + 9)

    D(x) = 25x² + 10x + 1 - 4x² + 12x - 9

    D(x) = 25x² - 4x² + 10x + 12x + 1 - 9

    D(x) = 21x² + 22x - 8

Autres questions