Question

Which expressions are polynomials?

Select each correct answer.

Answer 1

`2x^4 -y`, z+ 1 and 6+w

Explanation:

Polynomial : A polynomial is an expression consisting of variables and coefficients that involves only the operation of addition , subtraction multiplication and positive integer exponents of variable.

A.
`2x^4 -y` It is a polynomial of two variable.

B. z+ 1 It is a polynomial of one variable.

C.
`y^2- \sqrt[3]{y} +4` It is not polynomial because t power of y in second term is
`(1)/(3)`

D. 6+w It is a polynomial of one variable.