#### Answer

-15

#### Work Step by Step

We know that $\sqrt 225=15$, because $15^{2}=225$.
Therefore,$-\sqrt 225=-(15)=-15$.

Published by
Pearson

ISBN 10:
0321969359

ISBN 13:
978-0-32196-935-4

-15

We know that $\sqrt 225=15$, because $15^{2}=225$.
Therefore,$-\sqrt 225=-(15)=-15$.

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