Which expression is not a polynomial? A. 5x5 B. 8x10+2x5 C. 5x-1+4x-2 D. x5+2

In this question, we have four options, and we have to find, which expression is not a polynomial.

A polynomial should not have negative exponents or fractional exponents.

And out of the given four options, the third option have negative exponents. So it is not a polynomial.

Hence the correct option is the third option.

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we know that "Polynomials contains one or terms but powers of term must not be in rational numbers or in negative forms".

So, According to options,

A. 5x⁵ is a polynomial.

B. 8x¹⁰+2x⁵ is a polynomial.

C. 5x⁻¹+4x⁻² is not a polynomial because it contains negative powers.

D. x⁵+2 is a polynomial.

Hence, option 'c' is correct.