Answer
$-63x^4\sqrt{3x}$
Work Step by Step
Use the multiplication property of square roots.
$-21\sqrt{27x^9}=-21\sqrt{9x^8\times3x}=-21\times\sqrt{9x^8}\times\sqrt{3x}$
$=-21\times3x^4\times\sqrt{3x}=-63x^4\sqrt{3x}$
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 - 10-2 Simplifying Radicals - Practice and Problem-Solving Exercises - Page 610: 19
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