If f(x) = 2 ^{2} - x, find f(-3).
fx=2x-xf=2x/x-xf=2-x-3f=-3f-3f=-3(2-x)-3f=-6+3x
Plug in -3 for x. So 2^2 - -3=4+3. The answer is 7. f(-3)=7.
