Answer:
[tex]5x^{-1}+4x^{-2}[/tex]
Step-by-step explanation:
A polynomial expression is an expression that does not contain negative exponents. Also it does not have exponent in the denominator .
A. [tex]8x^{10}+ 2x^5[/tex] is a polynomial
B. [tex]5x^5[/tex] is a polynomial
C. [tex]x^5+2[/tex] is a polynomial
D. [tex]5x^{-1}+4x^{-2}[/tex]. it has negative exponent so it is not a polynomial.
