Question 856719
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product of two consecutive odd integers is,...
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{{{n(n+2)=-57+9(n+n+2)}}}


{{{n^2+2n=9(2n+2)-57}}}

{{{n^2+2n=18n+18-57}}}

{{{n^2-16n+57-18=0}}}

{{{n^2-16n+39=0}}}

{{{(n-3)(n-13)=0}}}

{{{system(n=3,or,n=13)}}}


Check each of these separately and see if one or both of them will work.