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Math Help - Factor

  1. #1
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    Factor

    5x^4-4x^3+19x^2-16x-4

    I divided it by x^4+4

    = 5x^2-4x-1


    I always having hard time factoring.... can you factor me this quadratic equation please.... 5x^2-4x-1 thanks...
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  2. #2
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    Quote Originally Posted by Anemori View Post
    5x^4-4x^3+19x^2-16x-4

    I divided it by x^4+4

    = 5x^2-4x-1


    I always having hard time factoring.... can you factor me this quadratic equation please.... 5x^2-4x-1 thanks...
    Dear Anemori,

    If you factorize, 5x^2-4x-1=(5x+1)(x-1)

    Anyway your division is wrong. You would not get 5x^2-4x-1 when 5x^4-4x^3+19x^2-16x-4 is divided by, x^4+4. Quite obvious since if you multiply x^4+4 and 5x^2-4x-1 you would get a 6th degree polynomial.

    Hope this will help you.
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  3. #3
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    Dear Anemori,

    Also I want to share this factorizing calculator which you would find handy to check your calculations.

    Algebra.Help -- Factoring Calculator
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  4. #4
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    Quote Originally Posted by Sudharaka View Post
    Dear Anemori,

    Also I want to share this factorizing calculator which you would find handy to check your calculations.

    Algebra.Help -- Factoring Calculator

    Thanks to you all!
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