Question

Which expressions are polynomials?

Answer 1

Answer:

They all are polynomials.

Step-by-step explanation:

Given : Following expression

1)  $x^2+5x^{15}$

2)  $-x^2+5x$

3) $6x^2+5x$

4) $-7x^2+53x$

The following all are polynomials because polynomials are:

An expression consisting of variables and coefficients or expression more than two algebraic terms and the terms that contain different powers of the same variable(s) involve operations addition , subtraction, multiplication and non-negative integer exponent of variables.

So when we see to these functions they all are a mixture of a polynomial.

Answer 2

Answer:

The answer is actually just two of them, the second and third.

Step-by-step explanation:

Here is a screenshot showing the graded answer as correct.

The two with fractions are NOT polynomials!