Answer
$z=\pm \sqrt 3$
Work Step by Step
$5z^2-45=0$
$5z^2=45$
$z^2=9$
$z=\sqrt 9$
$z=\pm \sqrt 3$
There are two solutions, $ \pm 3$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Practice and Problem-Solving Exercises - Page 564: 31
Update this answer!
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.
