Algebra-2

To find f(n) + g(n), we add the function expressions term by term:
f(n) + g(n) = (n² + 4n) + (-n - 5)

Combine like terms:
f(n) + g(n) = n² + 4n - n - 5

Simplify the expression:
f(n) + g(n) = n² + 3n - 5

Therefore, the correct answer is A. n² ...