Problem
Part 1 of 2 points Points: 0 of 1 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.)
Solution
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 \(\boxed{(-\infty, \infty)}\).
