To apply a reflection across the x-axis to the function \( f(x) = |x| + 2 \), you need to change the sign of the entire function.
The transformation rule for reflecting across the x-axis is to take the negative of the function. Therefore, the transformation of \( f(x) \) will be:
\[ g(x) = -|x| + 2 \]
So, filling in the blanks in your equation, we have:
\[ g(x) = -|x| + 2 \]