Consider the function h(x)=9−x2−4x+4h(x) = \sqrt{9 - \sqrt{x^2 - 4x + 4}}h(x)=9−x2−4x+4. What is the domain of h(x)h(x)h(x)?
[−7,11][-7, 11][−7,11]
(−∞,∞)(-\infty, \infty)(−∞,∞)
[−1,5][-1, 5][−1,5]
[2,9][2, 9][2,9]