Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 1 - Foundations for Algebra - 1-6 Multiplying and Dividing Real Numbers - Practice and Problem-Solving Exercises: 23

Answer

-30

Work Step by Step

$\sqrt 900$ means that we are supposed to find what number times itself equals 900. We recall that 30 times 30 is 900, so $\sqrt 900$ is 30. However, as we can see, there is a negative outside of the square root. This means that we multiply $\sqrt 900$, 30, by -1, giving us our final answer: -30.
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