Question

For f(x)=2x + 1 and g(x)=x²-7, find (fog)(x)

Answer 1

f(g(x))= f(x²-7)= 2(x²-7)+1

2(x²-7)+1

2x²-14+1

2x²-13

So (fog)(x)= 2x²-13. Hope this helps!