Question

Medal to the one who helps me!
Simplify the expression.

Answer 1

12P5=12*11*10*9*8

Answer 2

Huh?

Answer 3

Use this formula : \(^n P _r = \cfrac{n!}{(n-r)! } \)

So, : \(^{12} P _ 5 = \cfrac{12! }{(12-5)!}\)

Can you solve it now?

Answer 4

12P5=12*11*10*9*8*7!/7!=12!/7!=12!/(12-5)!
so these are the same.