Question

I will medal.. if you can help me!

Answer 1

@welshfella

Answer 2

Hint: the function is not one-to-one because x can be negative or positive
so f(-2) = (-2)^2 + a = 4 + a
and f(2) = (2)^2 + a = 4 + a

Answer 3

well now that we have that whats the next step? what do i do with that?

Answer 4

@perl

Answer 5

@Night-Watcher

Answer 6

do you know the next step Night?