Question 892542
{{{N+N^2=56}}}
{{{N^2+N-56=0}}}
{{{(N+8)(N-7)=0}}}
Two solutions:
{{{N+8=0}}}
{{{N=-8}}}
and
{{{N-7=0}}}
{{{N=7}}}
Since we're only looking for positive solutions,
{{{N=7}}}