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    HSC 2017 MX2 Marathon (archive)

    Re: HSC 2017 4U Marathon For z^5-1=0, the roots are 1, w^2-w^4, and z^5-1=(z-1)(z-cis2pi/5)(z-cis-2pi/5)(z-cis4pi/5)(z-cis-4pi/5) How do you get back to the LHS from expanding the RHS?
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