basically
f(x)=4x-1 and
g(x)=x^2+7
so basically subsitute whatever is in the x place for x and solve so
if you want to find g(f(x)) then that would be
subsiute f(x) for x in g(x) so
f(x)=4x-1
so subsittue 4x-1 for x in g(x)
g((4x-1))=g(f(x))=(4x-1)^2+7
solve
(4x-1)^2+7=16x^2-8x+1+7=16x^2-8x+8
the answer is 16x^2-8x+8
the answer is c
