Question

calcule :
A)7!-5!
B)5.3!

Answer 1

7! = 7.6.5.4.3.2.1 = 5040
5! = 5.4.3.2.1 = 120

5040 - 120 = 4920

5 . 3! = 5 . 3.2.1 = 30

Answer 2

A)
7!-5!
5040-120
4920

B)
5*3!
5*6
30