Question 772083
Positive integer, n
Its square, n^2

{{{n^2+n=110}}}
{{{n^2+n-110=0}}}
Can you factor the trinomial?
(n______11)(n_______10)
You want {{{(n+11)(n-10)=0}}} and find n.  One solution will be positive integer and the other will be what you do not want, a negative integer.