Answer
ellipse
Work Step by Step
From the given equation, we have $A=1, C=16$. Thus $AC=16\gt 0$, which indicates an ellipse (not a circle since $A\ne C$).
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 9 - Review Exercises - Page 1036: 40
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