What is the domain of f(x) = 9 - x2?

What is the domain of f(x) = 9 - x2?

All real numbers

-3 ≤ x ≤ 3

x ≤ 9

(fx) ≥ 9

The domain of f(x) = 9 - x^2 is all real numbers. There are no restrictions on the values of x for this function.