Respuesta :

AlgebraicAardvark

(fog)(-1) = f( g(-1) )

So the first step is to figure out g(-1) and then use that in f(x).

g(-1) = 4(-1) + 1

       = -3

f(-3) = 2(-3)^2 -4(-3) + 9

      = 2(9) + 12 + 9

      = 39

So, (f o g)(-1) = f(g(-1)) = f(-3) = 39