Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.7 Multiplication and Division of Real Numbers - 1.7 Exercise Set - Page 58: 50



Work Step by Step

The product of two numbers with opposite signs is negative while the product of two numbers with the same sign is positive. Multiplying the numbers from left-to-right, then the given expression, $ -3\cdot(-5)\cdot(-2)\cdot(-1) $, simplifies to \begin{array}{l} 15\cdot(-2)\cdot(-1) \\\\= -30\cdot(-1) \\\\= 30 .\end{array}
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