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svp urgent cest lexercice 2comment on reduit
svp urgent cest lexercice 2comment on reduit

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  • exercice 2
    a. A = 7(-3x²) = -21x²
    B = 7+5x (on ne peut pas réduire)
    C = 7 x 2x = 14x
    D = -2x-5x = -7x
    E = 9x-x = -8x
    F = -4x(-3x) = 12x²
    G = -6x² x 5 = -30x²
    H = 5x² -9x² = -4x²
    I = 4(-3x²) = -12x²

    b. I = 6 x 2a - 7x3a
    I = 12a - 21a
    I = -9a

    J = 3b x 5b - 2b x 8b
    J = 15b² - 16b²
    J = -b²

    K = 3c²+5c-13+7c²-8c+21
    K = 3c²+7c² +5c-8c -13+21
    K = 10c²-3c-8

  • Exercice 2 :

    A = 7(- 3x²)
    A = - 21x²

    B = 7+ 5x (irréductible)

    C = 7 * 2x
    C = 14x

    D = -2x - 5x
    D = - 7

    E = 9x - x
    E = 8x

    F = - 4x (- 3x)
    F = 12x²

    G = -6x² * 5
    G = - 30x²

    H = 5x² - 9x²
    H = - 4x²

    I = 4 (- 3x²)
    I = -12x²

    J = - 6x² + x²
    J = - 5x²

    I = 6 * 2a - 7 * 3a
    I = 12a - 21a
    I = - 9a

    J = 3b * 5b - 2b * 8b
    J = 15b² - 16b²
    J = -b²

    K = 3c² + 5c - 13 + 7c² - 8c + 21
    K = 3c² + 7c² + 5c - 8c - 13 + 21
    K = 10c² - 3c + 8

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