Engineering
Mathematics
Cube Roots of Unity
Question

Let ω=e3 and a, b, c, x, y, z be non‑zero complex numbers such that

                                            a + b + c = x

                                            a + bω + cω2 = y

                                            a + bω2 + cω = z

Then the value of  |x|2+|y|2+|z|2|a|2+|b|2+|c|2, is

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Solution

wrong question if w = ei2π/3 then ans is 3. If w = eiπ/3 then no integral solution is possible.