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Fp2 roots of equations help needed

Need help with a question:
equation : x3 - 2x - 5 = 0
has roots alpha, beta , gamma.
find the cubic equation with roots alpha3 beta3, gamma3 where do I start with this question , I have found -d/a as 15 is this right?
Thank you
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Original post by Elliesims
Need help with a question:
equation : x3 - 2x - 5 = 0
has roots alpha, beta , gamma.
find the cubic equation with roots alpha3 beta3, gamma3 where do I start with this question , I have found -d/a as 15 is this right?
Thank you


How did you get that value?

I would use a substitution.

Substitute u1/3u^{1/3} for xx and the question almost does itself. :tongue:

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