Question

(n-1)!-(n)! is equal to what and how ??

Answer 1

\[(n-1)!-n(n-1)!=(n-1)!(1-n)\]

Answer 2

the answer is nxn! how come ??

Answer 3

lets test what you said
n*n!=(n-1)!-n! ?
let;s see if it works for n=2
2*2!=(2-1)!-2!
4=1-2 <- not true
now lets test what i said
(n-1)!(1-n)=(n-1)!-n! ?
let's try n=2

(2-1)!(1-2)=(2-1)!-2!
1(-1)=1-2
-1=-1 <- this is true

Answer 4

so n* n! is total not right

Answer 5

totally*