Question

Find one value of x for which f(2) & f(x)=4

Answer 1

The first thing we must do for this case is to observe the value of the y coordinate for a given value of the x coordinate.
 We have then:
 f (x) = - 4: occurs when x = 0 
 On the other hand, for x = 2 we have:
 f (2) = - 2
 Answer:
 f (x) = - 4: occurs when x = 0
 f (2) = - 2