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Math Help - create a polynomial...

  1. #1
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    create a polynomial...

    How do I create a quartic polynomial function that opens down, has a positive real triple zero and one negative real zero?
    examples please?

    thankyou
    Last edited by falloutatthedisco; August 30th 2008 at 02:25 PM.
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  2. #2
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    Quartic polynomial

    y = (x-a)(x-b)(x-c)(x-d)

    Opens down

    y = -(x-a)(x-b)(x-c)(x-d)

    Triple Positive

    0 < b = c = d -- Just pick a value > 0 amd use it three times.

    Single Negative

    a < 0 -- Just pick a value < 0.

    a = -1 < 0
    b = c = d = 1 > 0

    y = -(x+1)(x-1)(x-1)(x-1)
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