Answer
Hyperboloid of two sheets.
Work Step by Step
$-4x^2+y^2-4z^2=4$
or, $4x^2-y^2+4z^2+4=0$
This shows the graph of a Hyperboloid of two sheets.
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 12 - Vectors and the Geometry of Space - Review - Exercises - Page 883: 33
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