Answer
$z=6-3\sqrt2$ and $z=6+3\sqrt2$
Work Step by Step
$(z-6)^2 = 18 \\ z-6 = ±3\sqrt2 \\$
$z-6=-3\sqrt2 \rightarrow z=6-3\sqrt2$
$z-6=3\sqrt2 \rightarrow z=6+3\sqrt2$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.