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Give the domain and range of the quadratic function whose graph is described.
\[
\text { Maximum }=-9 \text { at } \mathrm{x}=2
\]

The domain of the function is $\square$. (Type your answer in interval notation.)

Answer

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Answer

Final Answer: The domain of the function is $\boxed{(-\infty, \infty)}$.

Steps

Step 1 ：The domain of a quadratic function is all real numbers because a quadratic function is defined for all real values of x.

Step 2 ：Therefore, the domain of the function is (-∞, ∞).

Step 3 ：Final Answer: The domain of the function is $\boxed{(-\infty, \infty)}$.