Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - P.S. Problem Solving - Page 157: 7b


As mn=9 and m and n are nonzero hence they are either both positive or both negative as their product is positive. Thus, the equation m+n=0 has no real solutions as this equation require either m and n are both zero which is not the case as their product is non zero, or m is the negative of n. Hence there are no real solutions, but there are complex solutions.

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