Answer
See below.
Work Step by Step
A quadratic inequality in one variable is: e.g. $x^2\gt0$.
A quadratic inequality in two variables is: e.g. $x^2+y^2\gt0$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 4 Quadratic Functions and Factoring - 4.9 Graph and Solve Quadratic Inequalities - 4.9 Exercises - Skill Practice - Page 304: 1
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