Answer
$-2t^4+5t^2$
Work Step by Step
We combine the like terms,
($t^4$ and $t^2$)
$t^4*(7-9)+t^2*(7-2)$ or $-2t^4+5t^2$
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 1, Equations and Inequalities - Chapter Review - Page 62: 15
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