Answer
NOT a polynomial
Work Step by Step
$\bf{\text{Solution Outline:}}$
Use the description of a polynomial expression to evaluate if the given expression, $
3s-\sqrt[4]{t}
,$ is a polynomial or not.
$\bf{\text{Solution Details:}}$
A polynomial expression is an expression where the exponent of the variable in every term is a nonnegative integer.
The term $-\sqrt[4]{t}$ is equivalent to $-t^{\frac{1}{4}}.$ So, this term has an exponent that is NOT a nonnegative integer. Hence, the given expression is $\text{
NOT a polynomial
.}$