Explanation: First, when we have a negative power in the numerator, the number with this power will be moved to the denominator and the power is converted to a positive one. In other words: a^-x = 1 / a^x
In the question, we have: -(4)^-2 This can be written as: - 1 / 4^2 = -1 / (4*4) = -1/16