College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Section R.2 - Real Numbers and Their Properties - R.2 Exercises: 109

Answer

$x$ and $y$ need to be positive or negative.

Work Step by Step

Both x and y need to be either positive or negative for the statement to hold true. This is because positive times positive is positive and negative times negative is positive.
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