Question

x - 9 f(x) = { for x +-4 for x = -4 -4 Find f(-4)

Answer 1

You have the following piece function:

f(x) = -x-9 for x≠-4

-4 for x=-4

as you can notice in the previous piece function, there is a unique value of f(x) when x=-4, and such value is f(-4) = -4