mohon bantuannya biarpun hanya 1 nomor!!!

1) ( gof) (x) = x^ +2x-7
g(x) = x+4

g(f(x)) = x ^ +2x-7
f(x)+4 =x^+2x-7
f(x) = x^+2x-7-4
f(x) = x^+2x-11

^ artinya kuadrat

nmr 2 nya lanjutin aj .. w bingung cara lanjutinnya .. sorry gk bnyak