Show that f (x) = 2x2 -3 is an even function. Explain why itsgraph is symmetric about the y-axis.

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter8: Functions
Section8.2: Linear Functions And Applications
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Show that f (x) = 2x2 -3 is an even function. Explain why its
graph is symmetric about the y-axis.

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