Answer
$\color{blue}{4\sqrt{11b}-12a\sqrt{5}}$
Work Step by Step
Combine like terms to obtain:
$=(\sqrt{11b}+3\sqrt{11b})+(3a\sqrt{5}-15a\sqrt{5})
\\=(1+3)\sqrt{11b}+(3-15)a\sqrt{5}
\\=\color{blue}{4\sqrt{11b}-12a\sqrt{5}}$
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 8 - Radical Functions - 8.2 Simplifying, Adding, and Subtracting Radicals - 8.2 Exercises - Page 634: 64
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