8. A restriction on the domain of f(x) = x2 + 4 , such that its inverse is also a function, could be: A. X2 -4 B. X2 0 C. X 52 D. X 5 49 . Identify the three polynomial functions from the choices A to H. Indicate your 3 answers using capital letters. Which of the following are polynomial functions (include equations and graphs) (a) y = 2x5 - 14x2 + V2 (b) y=-5x4 -14x-1 +1 (c) y = 2(5 ) * - 2 (d) y = 2x2 -5Vx (e)