Question 551714
f(x)= 3x+5


f(g(x))= 3g(x)+5


f(g(x))= 3(x^2+1)+5


f(g(x))= 3x^2+3+5


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g(x)= x^2+1


g(f(x))= (f(x))^2+1


g(f(x))= (x^2+1)^2+1


g(f(x))= x^4+2x^2+1+1


g(f(x))= x^4+2x^2+2