Answer
$18x^{11}y^{3}$
Work Step by Step
RECALL:
$a^m \cdot a^n = a^{m+n}$
Multiply the coefficients together then use the rule above to the variables to obtain:
$=18x^{4+7}y^{2+1}
\\=18x^{11}y^{3}$
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 5 - Section 5.2 - Multiplication of Polynomials - Exercise Set - Page 337: 4
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