Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Section 5.4 - Multiplication of Monomials - Exercise: 13

Answer

$21a^4b$

Work Step by Step

Multiply the numerical coefficients. Add the powers of the variables. $(-42a)(-\frac{1}{2}a^3b)=(-42\times-\frac{1}{2})a^{1+3}b=21a^4b$
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