So for this, our equation is gonna be[tex] (f-g)(x)=3x^{-4}-(x+2) [/tex]
Firstly, reverse the signs in (x+2) [tex] (f-g)(x)=3x^{-4}-x-2 [/tex]
Next, change 3x^-4 to 3/x^4, and your answer will be [tex] (f-g)(x)=\frac{3}{x^4}-x-2 [/tex]