(n+4)^2
Expand the following: (n+4)^2
(n+4) (n+4) = (n) (n) + (n) (4) + (4) (n) + (4) (4): n n+4 n+4 n+4 4
n n = n^2: n^2+4 n+4 n+4 4
4×4 = 16: n^2+4 n+4 n+16
4 n+4 n = 8 n: Answer: | n^2+8 n+16
