Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 9 - Quadratic Functions and Equations - 9-3 Solving Quadratic Equations - Practice and Problem-Solving Exercises: 8

Answer

x=±3

Work Step by Step

You add 9 to both sides. That gives you $x^{2}=9$ Then you square root both sides to get the final answer of $\sqrt x^{2}=\sqrt 9$ **** The root of 9 is 3 because 3 x 3 = 9 x=±3 The square root of any number always has two answers, therefore we can have positive or negative sign (±)
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