I need help please ASAP!
(f - g) (x) means f(x) - g(x) =
[ x^4 - 4x^2 + 4 ] - [ x^3 - 2x^2 + 4x - 8 ] =
x^4 - x^3 - 4x^2 + 2x^2 - 4x + 4 + 8 =
x^4 - x^3 - 2x^2 - 4x + 12