Question

If f(x)=3x+5 and g(x)=x^2+1, what is the value of (g o f)(x)?

Answer 1

9x²+30x+26

Explanation:

f(x) =3x+5

g(x) =x²+1

(gof)(x) = g(f(x)) = g( 3x+5) = (3x+5)² +1 = 9x²+30x+25+1 = 9x²+30x+26