If z(bar) = z , what can you say about z?
What exactly is teh question asking us- all i can come up with is- z(bar) is basically a rotation about the x-axis at teh same argumetn as z...
same modulus ??
what else ?
$\displaystyle \begin{gathered}
\overline {x + yi} = x - yi \hfill \\
\overline {3 - 4i} = 3 + 4i \hfill \\
\overline { - 1 - i} = - 1 + i \hfill \\
\overline {4i} = - 4i \hfill \\
\overline { - 7} = - 7 \hfill \\
\end{gathered} $
From these examples can you answer the question?