Answer
$3x^3y^4\sqrt {xy}$
Work Step by Step
$\sqrt {9x^7y^9}=\sqrt {9x^6y^8}\sqrt {xy}=3x^3y^4\sqrt {xy}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 10 - Section 10.3 - Simplifying Radical Expressions - Exercise Set - Page 703: 55
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