Find the range of f(x)=6−2x−x2f(x) = \sqrt{6 - 2x - x^2}f(x)=6−2x−x2.
[0,7][0, \sqrt{7}][0,7]
[0,7][0, 7][0,7]
(−∞,7](-\infty, \sqrt{7}](−∞,7]
[0,6][0, 6][0,6]