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Discrete Math

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Prove that if a and b are integers with a not equal to zero and x is a real number such that ax^2-bx-b-a=0, then a | b. Note a | b means that a divides b.

  • Discrete Math -

    Is something wrong here?

    3x^2 + 4x + 1 = 0
    x = -1 or -1/3

    a = 3, b = -4

    a does not divide b

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