Question

If h(x) = x – 7 and g(x) = x2, which expression is equivalent (g o h)(5)

Answer 1

(goh)(x) = (g(x))(h(x)) = (x^2)(x-7) = x^3 -7x^2
then (goh)(5) = (5^3)-7(5)^2 = 124-7(25) = 124-175 = -51