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Math Help - How do i factor this

  1. #1
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    How do i factor this

    in the exam today I had to find the value of x when


    x^3 - 19x - 54 = 0


    I lost 10 marks just because i did not know how to do it, is there a general method for it?
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  2. #2
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    Quote Originally Posted by wopashui View Post
    in the exam today I had to find the value of x when


    x^3 - 19x - 54 = 0


    I lost 10 marks just because i did not know how to do it, is there a general method for it?
    You can use synthetic division; however, I don't think this thread belongs in Linear and Abstract Algebra.
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  3. #3
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    Quote Originally Posted by wopashui View Post
    in the exam today I had to find the value of x when


    x^3 - 19x - 54 = 0


    I lost 10 marks just because i did not know how to do it, is there a general method for it?
    It doesn't factorise. You must have been expected to use technology to solve it for you.
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