Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - 2.3 - Real Numbers and Algebraic Expressions - Problem Set 2.3 - Page 68: 32



Work Step by Step

The product of a negative real number and a negative real number is a positive real number. We convert the decimal into a fraction for the ease of simplification: $(-0.9)(-56)$ =$-\frac{9}{10}\times-\frac{56}{1}$ =$\frac{-9\times-56}{10}$ =$\frac{504}{10}$ =$50.4$
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