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16 March, 19:03

What is the result of dividing x^3-4 by x+2?

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  1. 16 March, 19:26
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    -1/2, 3/2

    Step-by-step explanation:

    x² - x - 3/4 = 0

    4x²/4 - 4x/4 - 3/4 = 0

    4x² - 4x - 3 = 0

    a = 4, b = - 4, c = - 3

    ∆ = b² - 4ac

    ∆ = ( - 4) ² - 4 • 4 • ( - 3)

    ∆ = 16 + 48

    ∆ = 64

    x = - b ± √∆ / 2a

    x = - ( - 4) ±√64 / 2 • 4

    x = 4 ± 8 / 8

    x' = 4 + 8 / 8 = 12/8 : 4 = 3/2

    x" = 4 - 8 / 8 = - 4/8 : 4 = - 1/2

    S = { - 1/2, 3/2}
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