Question

5n^2- 12n +4n + 26 - 10 — 4n^2 при n = 16.​

Answer 1

$5n^{2}-12n+4n+26-10-4n^{2} =n^{2} -8n+16=(n-4)^{2} \\\\n=16 \ \ \Rightarrow \ (n-4)^{2} =(16-4)^{2} =12^{2}=\boxed{144}$