1. f(x) and g(x) are both 5 at x=2. For values of x after x=2, g(x) is greater than f(x). (23 > 9.5, for example, at x=3)
2. f(x) describes a parabola that opens upward, so f(x) goes to +∞ as x goes to ∞. g(x) describes a parabola that opens downward (you can tell by the minus sign in front of x²). So, g(x) goes to -∞ as x goes to ∞. The second choice is applicable.
