Answer:
Explanation:
The operation (f - g)(-1) refers to finding the difference between the outputs of functions f and g when the input is -1.
From the given sets, we can see that for f, when the input is -1, the output is -1, and for g, when the input is -1, the output is -4.
Therefore, (f - g)(-1) = f(-1) - g(-1) = -1 - (-4) = 3.