Answer
$x=9\pm3i$
Work Step by Step
Let $x$ be the number we are looking for. Then: $3(x-9)^2=-27\\(x-9)^2=-9\\(x-9)=\pm3i\\x=9\pm3i$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 8 - Section 8.1 - The Square Root Property and Completing the Square - Exercise Set - Page 593: 64
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