Plz explain how to solve dis...
1) n (n - 1)
2) n (n + 1)
3) $n^2$
4) ${\left(n+1\right)}^2$

Dear Student,

Your question is not clear and appears to be incomplete.

Here , 1 ) n(n-1) = n² - n  ,

2 ) = n(n+1) = n² + n ,

3 ) n²

4 ) ( n + 1 )² = n² + 1 + 2 n

Recheck your question and please be a little specific so that we can provide you with some meaningful help. Looking forward to hear from you again !

Regards