mohon bantuannya matematika

[tex]f(x) = x + 2 \\ (gof)(x) = {x}^{2} + x + 5 \\ (g(f(x)) = {x}^{2} + x + 5 \\ (g(x + 2)) = {(x + 2)}^{2} - 3(x + 2) + 7 \\ g(x) = {x}^{2} - 3x + 7 \\ g( - 1) = 1 + 3 + 7 = 11\\[/tex]