Hello from MrBillDoesMath!
Answer:
x^2 + x - 4
Discussion:
(f-g)(x) = f(x) - g(x) by definition. In our case this becomes
(f-g)(x) = f(x) - g(x)
= (x^2 +1) - (5 - x)
= x^2 +x + (1-5)
= x^2 + x - 4
Thank you,
MrB
