College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 7 - Conic Sections - Exercise Set 7.2 - Page 687: 81

Answer

Doesn't make sense.

Work Step by Step

If we changed the addition sign in the equation of an ellipse to subtraction, we would change the ellipse to a hyperbola, but the orientation from horizontal to vertical would not change. Thus the statement doesn't make sense.
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