Let z(1),z(2) be two complex numbers suc...

Let `z_(1),z_(2)` be two complex numbers such that `z_(1)+z_(2)` and `z_(1)z_(2)` both are real, then

`z_(1)=-z_(2)`

`z_(1)=barz_(2)`

`z_(1)=-barz_(2)`

`z_(1)=z_(2)`

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