Answer:
[tex](gof)(x) = -5 {x}^{2} + 35x + 34[/tex]
Step-by-step explanation:
[tex](gof)(x) = g(f(x)) \\ = - 5( {x}^{2} - 7x - 9) - 11 \\ = - 5 {x}^{2} + 35x + 45 - 11 \\ = - 5 {x}^{2} + 35x + 34[/tex]
I hope I helped you^_^
