Answer
$9x^{11}y^{2}$
Work Step by Step
RECALL:
The quotient rule of exponents states that: $\dfrac{a^m}{a^n}=a^{m-n}, a \ne 0$.
Divide the numerical coefficients, and use the quotient rule to find:
$=9x^{12-1}y^{4-2}
\\=9x^{11}y^{2}$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 1 - Section 1.6 - Properties of Integral Exponents - Exercise Set - Page 79: 22
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