#### Answer

polynomial; degree $4$

#### Work Step by Step

The function is a polynomial function because the exponent of the variable is a nonnegative integer. The largest exponent is $4$, so the degree is $4$.
$f(x)=7x^2+9x^4$

Published by
Pearson

ISBN 10:
0-32178-228-3

ISBN 13:
978-0-32178-228-1

polynomial; degree $4$

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