Question

Simplifique esse fatorial (x+1)! (y+1)/(x-2)! (y+2)!

Answer 1

         $\frac{(x+1)!(y+1)!}{(x-2)!(y+2)!} \\ \\ = \frac{(x+1)(x)(x-1)(x-2)!(y+1)!}{(x-2)!(y+2)(y+1)!} \\ \\ = \frac{(x+1)(x)(x-1)}{y+2} \\ \\ = \frac{x^3-x}{y+2}$