No to both questions. A polynomial is a sum of at least one integer power of x (or other unknown), each multiplied by a constant. '9' is simply a constant. 2^x is a power of 2, not a power of x.

Is 9 a polynomial?
Is 2^x a polynomial?

To determine whether a given expression is a polynomial or not, follow these steps:

1. Examine the expression to see if it consists of the sum of terms.
2. Check if each term consists of a constant multiplied by a variable raised to a non-negative integer power.
3. If the expression satisfies both conditions, it is a polynomial; otherwise, it is not.

Now, applying these steps to the given expressions:

1. Is 9 a polynomial?
- In this case, the expression consists only of the constant '9'.
- Since a polynomial requires at least one term with a variable raised to a non-negative integer power, '9' does not meet that requirement.
- Therefore, '9' is not a polynomial.

2. Is 2^x a polynomial?
- The expression '2^x' represents a power of 2 raised to the variable 'x'.
- However, for an expression to be a polynomial, the variable must appear as a base with a non-negative integer exponent, not as an exponent itself.
- Therefore, '2^x' does not fulfill the criteria for a polynomial, making it not a polynomial.

In conclusion, both '9' and '2^x' are not considered polynomials according to the definition.