Answer:
(2n+1)(2n+2)
Explanation:
A factorial is the product of a number and all the positive integers before it.
For example 3!=3·2·1 and 5!=5·4·3·2·1
(2n+2)! would equal (2n+2)(2n+1)(2n)(2n-1)…(n)
2n! would equal (2n)(2n-1)(2n-2)…(n)
When you divide the two all the terms cancel out except (2n+2)(2n+1)