Question

If z²-z+2=0 find
[ z + 1/ z ]^2 + [ z^2 + 1 / z^2]^2 + [ z^3 + 1 / z^3]^2 + [ z^4 + 1/ z^4 ]^2 + [ z^5 + 1/ z^5 ]^2 + [ z ^6 + 1/ z^6 ]^2​

Answer 1

Answer:

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