what is (f+ g) (x) ?
F(x) = 8x^2 + 16x+6
g(x) = x^3 - 3x ^2 -9
(f+g)(x)=
(f + g) (x) = f(x ) + g(x) =
[8x^2 + 16x + 6 ] + [ x^3 - 3x^2 - 9 ] =
x^3 + 5x^2 + 16x - 3
+51 
