Which expressions are polynomials? select each correct answer. 30y^2 30y^2+x 30y2x 30y2+x12

To know which of the following expressions are polynomials, let us look at the definition of a polynomial:

Polynomial is derived from poly- (which means "many") and -nomial (meaning "term"), so it says "many terms".

For an instance: is a polynomial, but is not a polynomial because it contains single term only.

We must keep in mind that in polynomial it can have variables, constants, and exponents but it can never have division by a variable.

Now lets, look at the

since it has got one term it can not be a polynomial.

: it has got more than one term therefore, it is a polynomial.

: again it has got just one term so it is not a polynomial.

: Since it has got more than one term, so again it is a polynomial.

step-by-step explanation:

your answer is a