Question

f(x)=3x+9 , g(x)=2x+8 then find f[g(x)]-g[f(x)]+2f(x)-3g(x)

Answer 1

Step-by-step explanation:

f[g(x)]-g[f(x)]+2f(x)-3g(x)

f[2x+8]-g[3x+9]-3[2x+8]

2(3x+9)+8-3(2x+8)+9-6x+24

(6x+18+8)-(6x+24+9)-(6x+24)

6x+26-6x-35-6x-24

-6x-33

6x+33