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March 29, 2017

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Find a third degree polynomial P(x) that has zeros at x=-1, x=1, x=2 and whose x-term has coefficient 3?

  • Pre Calculus - ,

    P(x) = a(x+1)(x-1)(x-2)
    = ax^3 - 2ax^2 - ax + 2a

    Looks like a = -3

    P(x) = -3(x+1)(x-1)(x-2) = -3x^3 + 6x^2 + 3x - 6

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