Answer
z=6±3$\sqrt 2$
Work Step by Step
Original Equation
(z-6)²=18
Take the square root of both sides
z-6=±$\sqrt 18$
Simplify the radical
z-6=±3$\sqrt 2$
Add 6 to both sides
z=6±3$\sqrt 2$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 8 - Section 8.1 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 482: 11
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