Answer
D) 441
Work Step by Step
$(-21)^2$ means $-21\times-21$, which is 441.
When a negative is multiplied by a negative, the product is positive.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Entry-Level Assessment - Page xxxix: 11
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