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Math Help - Form a polynomial help

  1. #1
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    Form a polynomial help

    Hey guys , Need help with this one -( Form a polynomial whose zeros and degrees are given. Zeros; -1 , 1 , -7 degree 3 )

    Thanks
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  2. #2
    Senior Member I-Think's Avatar
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    Any polynomial with 3 roots has a degree 3
    So, you have the roots at x=1, x=-1 and x=-7
    Carry over so that you have
    (x-1), (x+1) and (x+7), these are the 3 factors of your desired polynomial so just multiply them to get your answer.

    (x-1)(x+1)(x+7)
    (x^2-1)(x+7)
    x^3+7x^2-x-7
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