Hello! I'm having a bit of trouble working out how the following expression is factorised.
1/4nˆ2 (n+1)ˆ2 – 1/2n(n+1)
Here is the answer
= 1/4n(n+1)(nˆ2+n-2)
If anybody could show a working of how that answer is acheived it would be much appreciated.
Thanks!