Question

If f(x) = x + 4 and g(x)=x^2-1, what is m(g o f)(x)?

Answer 1

c

Explanation:

Answer 2

gof(x) = x²+8x+15

Explanation:

gof(x) = g(f(x))

f(x) = x + 4 and g(x)=x²-1

Substituting

gof(x) = g(f(x)) = g(x + 4) = (x+4)²-1

gof(x) = x²+8x+16 -1 = x²+8x+15

That is if f(x) = x + 4 and g(x)=x²-1, gof(x) = x²+8x+15