Question

Which expressions are polynomials?

Select each correct answer.


6x² + 5x

−7x^2+5/3x

−x^2 +5x

x^2+5x ^1/5

Answer 1

`6x^2+ 5x`

`-x^2 +5x`

Explanation:

Expression is a polynomial when it contains variables, numbers and operators. Expression that contains fractional exponent is not a polynomial. Expression with variable in the denominator is not a polynomial.

`6x^2+ 5x`

It is a polynomial

`-7x^2+ (5)/(3x)`

It is not a polynomial because x is in the denominator

`-x^2 +5x`

It is a polynomial

`x^2+5x ^ (1)/(5)`

It is not a polynomial because it has fractional exponent