Geometry: Common Core (15th Edition)

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

Chapter 10 - Area - Get Ready! - Page 611: 10


positive and negative 15

Work Step by Step

The problem is $b^{2} - 225 =0$ so first we must isolate the variable. To do this, we move 225 to the other side of the equation. Then, we get $b^{2} = 225$ and we put a square root over both $b^{2}$ and $225$ to get b= positive and negative 15.
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