Answer
$(9x+20)\sqrt{y}$
Work Step by Step
We simplify:
$3x\sqrt{9y}+4\sqrt{25y}=3*3x\sqrt{y}+4*5\sqrt{y}=9x\sqrt{y}+20\sqrt{y}=(9x+20)\sqrt{y}$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter R - Section R.8 - nth Roots; Rational Exponents - R.8 Assess Your Understanding - Page 78: 46
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