Answer
$-72y^4$
Work Step by Step
Multiply the two terms together.
$(9y^2)(-8y^2)=(9\cdot(-8))(y^4)=-72y^4$
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 704: 104
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