Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.1 - Exponents and Scientific Notation - Exercise Set: 55

Answer

$-140x^{12}$

Work Step by Step

We are given the expression $-7x^{3}\times20x^{9}$. We can simplify by grouping like terms. $(-7\times20)\times(x^{3}\times x^{9})$ Next, we can use the product rule, which holds that $a^{m}\times{a^{n}}=a^{m+n}$ (where a is a real number, and m and n are positive integers). $-140\times(x^{3+9})=-140x^{12}$
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