Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 8 - Radical Functions - Chapter Review Exercises: 77

Answer

$7i$

Work Step by Step

Step 1: $\sqrt {-4}+\sqrt {-25}$ Step 2: $\sqrt {-1\times4}+\sqrt {-1\times25}$ Step 3: $(\sqrt {-1}\times\sqrt 4)+(\sqrt {-1}\times\sqrt {25})$ Step 4: $(i\times2)+(i\times5)$ Step 5: $2i+5i$ Step 6: $7i$
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