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Math Help - Solve the cubic equation

  1. #1
    Faz
    Faz is offline
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    Solve the cubic equation

    solve this cubic equation

    (X*X*X) - 4(X*X) + X + 6 =0
    Ans accurate to 3 decimal places
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  2. #2
    Senior Member
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    Quote Originally Posted by Faz View Post
    solve this cubic equation

    (X*X*X) - 4(X*X) + X + 6 =0

    Ans accurate to 3 decimal places
    What does that mean? Do you want to use Newton's method or something?

    Otherwise you find a zero very fast, x = 2 is a zero

    now calculate (x^3-4x^2+x+6) / (x-2)
    [Polynomial long division]

    then you find the other two zeros, -1 and +3
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