The equation \( \log_x 4 = -2 \) can be rewritten in exponential form. The logarithmic equation states that \( x^{-2} = 4 \).
Rearranging this gives us:
\[ 4 = x^{-2} \quad \text{or} \quad (4)^{(-2)} = x \]
Therefore, the correct answer from the given options is:
\[ (4)^{-2} = x \]
So the correct response is:
left parenthesis 4 right parenthesis superscript negative 2 baseline equals x