Answer
$9\sqrt5$
Work Step by Step
$12\sqrt5-3\sqrt5\longrightarrow$ use distributive property
=$\sqrt5(12-3)\longrightarrow$ simplify
=$9\sqrt5$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-3 Operations with Radial Expressions - Practice and Problem-Solving Exercises - Page 616: 10
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