Answer
$\dfrac{y^{45}}{x^{63}}$
Work Step by Step
$(x^{-7}y^{5})^9=x^{(-7*9)}y^{(5*9)}=x^{-63}y^{45}=\dfrac{y^{45}}{x^{63}}$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Section 5.6 - Integrated Review - Exponents and Operations on Polynomials - Page 390: 15
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