To reflect the function \( f(x) = (x + 1)^2 \) over the x-axis, we multiply the entire function by -1. Therefore, the reflected function \( g(x) \) will be:
\[ g(x) = -f(x) = -((x + 1)^2) \]
This simplifies to:
\[ g(x) = -(x + 1)^2 \]
So the correct equation for \( g(x) \) is:
\[ g(x) = -(x + 1)^2 \]
Thus, the right response is:
g(x) = −(x + 1)².