What is (f-g)(x)?
f(x)=x^4 - x^2 + 9
g(x)= x^3 + 3x^2 + 12
(f-g)(x) = ?
(f - g) (x) =
f(x) - g(x) =
[ x^4 - x^2 + 9 ] - [ x^3 + 3x^2 + 12] =
x^4 - x^2 + 9 - x^3 - 3x^2 - 12 =
x^4 - x^3 - 4x^2 - 3
