Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.3 - The Parabola - Exercise Set - Page 997: 52

Answer

ellipse.

Work Step by Step

Comparing the given equation with the general form $Ax^2+Bxy+Cy^2+Dx+Ey+F=0$, we have $A=9, C=25$. Since $AC=225\gt 0, A\ne C$, the equation represents an ellipse.
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