IMO Shortlist 1968 problem 23
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arhiva2. travnja 2012. Find all complex numbers
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such that polynomial
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can be represented as the product of three linear trinomials.
%V0
Find all complex numbers $m$ such that polynomial
$$x^3 + y^3 + z^3 + mxyz$$
can be represented as the product of three linear trinomials.
Izvor: Međunarodna matematička olimpijada, shortlist 1968