Which of the following is NOT a polynomial?
Show answer & explanation
Correct answer: C
Explanation
In a polynomial, the exponent of each variable must be 0 or a positive integer.
a²b + ab² is a polynomial.
x² + 2x + 3 is a polynomial.
√x = x^(1/2) is not a polynomial, because the exponent is 1/2 (a fraction).
ab + bc + cd + ef + 9a² is a polynomial.