Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set: 155

Answer

To subtract two real numbers $a$ and $b$, change the operation to subtraction and then change the sign of the subtrahend to its opposite. In symbols, $a-b = a + (-b)$. (refer to the step-by-step part for an example)

Work Step by Step

To subtract two real numbers $a$ and $b$, change the operation to subtraction and then change the sign of the subtrahend to its opposite. In symbols, $a-b = a + (-b)$ Example: $9-3 = 9+(-3) = 6$
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