Answer:
x^2 - 2x - 4
Step-by-step explanation:
g(x) - f(x) = (x^2 + 1) - (2x + 5) = x^2 + 1 - 2x -5 = x^2 -2x +(1-5) = x^2 - 2x - 4
r=-40
r/-8=5
times -8 on both sides
5 times -8 =-40
x = 22
x = 7 + 15
