Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Skills Handbook - Squaring Numbers and Finding Square Roots - Exercises - Page 889: 13


$x=7\text{ or }x=-7$

Work Step by Step

To solve the equation $x^2=49$, we must perform the opposite operation of squaring, which is taking the square root, in order to clear the exponent: $$x^2=49$$$$\sqrt {x^2}=\sqrt {49}$$$$x=\pm7$$$$x=7\text{ or }x=-7$$
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