Упростить. (n-3)^2-(2-n)*(4-n)

Question

Упростить.
(n-3)^2-(2-n)*(4-n)

Answer 1

= n^2 - 6n + 9 - ( 8 - 2n - 4n + n^2 ) = n^2 - 6n + 9 - n^2 + 6n - 8 = 1