A, C, and E are all polynomial functions.
Polynomial functions must have terms that have non-negative integer exponents. We can rewrite function B, [tex]F(x)=-x^3+5x^2+7\sqrt{x}-1[/tex] as:
[tex]F(x)=-x^3+5x^2+7x^1^/^2-1[/tex]
The exponent 1/2 is not an integer exponent.
We can also rewrite the function D, [tex]F(x)=\frac{3}{5}x^4-18x^2+5-\frac{10}{x^2}[/tex], as:
[tex]F(x)=\frac{3}{5}x^4-18x^2+5-10x^-^2[/tex]
We have a negative exponent, so this is not a polynomial.
