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Math Help - Algebra Polynomials

  1. #1
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    Algebra Polynomials

    I don't know if this is the correct forum that I've chosen, I'm new to this. I'm having some trouble with the following question. I would appreciate as much help as possible!!


    Let α, β, γ and δ denote the zeros of the quartic polynomial
    x^4 + 2x^3 + 3x^2 + 7x − 9.


    a)- Write down the four expressions for the elementary symmetric functions in α, β, γ and δ and give their values for this quartic polynomial.

    b)- By expressing the following in terms of these elementary symmetric functions, or otherwise, calculate the exact values of α^2+ β^2+ γ^2+ δ^2, and α^3+ β^3+ γ^3+ δ^3, and
    (α + β + γ − δ)(α + β − γ + δ)(α − β + γ + δ)(−α + β + γ + δ)
    Last edited by topsquark; May 14th 2011 at 10:52 AM. Reason: I have moved this thread to Pre-Calculus
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  2. #2
    Senior Member abhishekkgp's Avatar
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    Quote Originally Posted by sam126 View Post
    I don't know if this is the correct forum that I've chosen, I'm new to this. I'm having some trouble with the following question. I would appreciate as much help as possible!!


    Let α, β, γ and δ denote the zeros of the quartic polynomial
    x^4 + 2x^3 + 3x^2 + 7x − 9.


    a)- Write down the four expressions for the elementary symmetric functions in α, β, γ and δ and give their values for this quartic polynomial.

    b)- By expressing the following in terms of these elementary symmetric functions, or otherwise, calculate the exact values of α^2+ β^2+ γ^2+ δ^2, and α^3+ β^3+ γ^3+ δ^3, and
    (α + β + γ − δ)(α + β − γ + δ)(α − β + γ + δ)(−α + β + γ + δ)
    for this one you must show your attempt... at least for part (a).
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  3. #3
    Member rtblue's Avatar
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    Have you heard of newton's sums? Try that for part b.
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