What is (f−g)(x)?
f(x)=3x^5+6x^2−5
g(x)=2x^4+7x^2−x+16
(f - g) x = (3x^5+6x^2−5) - ( 2x^4+7x^2−x+16 ) =
3x^5 - 2x^4 - x^2 + x - 21
