Which algebraic expression is a polynomial?

The answer is B.

Step-by-step explanation: "Poly" means "many", and "nomial", in this case, meaning "term".

B is the only one with 3 or more different terms.

(negative number, whole number, two unknowns, and a square root)

The expression which is a polynomial is:

A polynomial expression is a expression of the form:

where n belong to non-negative integers and are real numbers.

1)

This is not a polynomial because the third term:

has a negative poswer of x which violates the definition of polynomial.

2)

In this each of the term satisfy the definition of polynomial and hence the expression is a polynomial expression.

3)

Here the second term is not a integer power and hence violate the definition of polynomial.

4)

which could also be written as:

Here the second term contain a negative power of x and hence is not a polynomial.

b) the dogs need to shift their focus to human scent.

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