Algebra and Trigonometry 10th Edition

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

Chapter 4 - 4.3 - Conics - 4.3 Exercises - Page 338: 39



Work Step by Step

Major axis is horizontal. $(±9,0)=(±a,0)$ $a=9$ $2b=6$ $b=3$ Standard form when major axis is horizontal: $\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$ $\frac{x^2}{9^2}+\frac{y^2}{3^2}=1$ $\frac{x^2}{81}+\frac{y^2}{9}=1$
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