Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.2 Real Numbers and Their Properties - R.2 Exercises: 109

Answer

$x=(+), y=(+)$ or $x=(-), y=(-)$

Work Step by Step

The question asks for the signs of values $x$ and $y$ that would make the statement $xy>0$ true. If the values $x$ and $y$ are known to be nonzero values, a positive $x$ and positive $y$ value would give a product greater than $0$. A negative $x$ and negative $y$ value would also give a product that is greater than $0$.
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