Question

Which expressions are polynomials? Select each correct answer.

20x2y

20x²

20x² + y

20x2+y12

Answer 1

They are all polynomials except the last one.

Explanation:

I took the test and got right

Answer 2

Each of these is a polynomial.

A polynomial is the sum or difference of one or more monomials. A monomial is a variable, a constant, or the product of variables and constants. Each of these is a monomial, so it is a polynomial as well.