Mathématiques

Question

Réduction des expressions eco 43 et 44
Réduction des expressions eco 43 et 44

1 Réponse

  • 43)
    A = 9x + 11 + 3x + 7
    A = 9x + 3x + 11 + 7
    A = 12x + 18

    B = 5x - 7 - 2x + 8
    B = 5x - 2x - 7 + 8
    B = 3x + 1

    C = 11 + 2x + 12,5 - x
    C = 2x - x + 11 + 12,5
    C = x + 23,5

    D = 1/4x - 2 - 5/4x + 9
    D = 1/4x + 8/4 - 5/4x + 36/4
    D = 1/4x - 5/4x + 8/4 + 36/4
    D = - 4/4x + 44/4
    D = - x + 11

    E = - 3x + 6 - 8 + 11x - 4x
    E = - 3x - 4x + 11x + 6 - 8
    E = - 7x + 11x - 2
    E = 4x - 2

    44)
    A = x² + 3x + 11 + 6x + 2x² + 1
    A = x² + 2x² + 3x + 6x + 11 + 1
    A = 3x² + 9x + 12

    B = 43 - 9x - 17x² + x - 21
    B = - 17x² - 9x + x + 43 - 21
    B = - 17x² - 8x + 22

    C = - 3x² + 7x - 11 - x² + 9 + 5x
    C = - 3x² - x² + 7x + 5x - 11 + 9
    C = - 4x² + 12x - 2