Question

n! - (n+2)!/(n-1)!
Me ajudem aaaaa​

Answer 1

( n (n-1)! - (n+2) (n+1) n (n-1)!) / (n-1)!

n (n-1)! ( 1 - (n+2) (n+1))/ (n-1)!

n (1 - (n+2) (n+1))

n ( 1 -( n^2 +3n +3))

n (-n^2 -3n -2)

n^3 -3n^2 -2n