Question 1179483

An orchard has {{{728}}} pear trees. 

The number of rows {{{x}}} exceeds the number of trees {{{y}}} per row by {{{2}}}.

{{{x=y+2}}}

{{{x*y=728}}}...........substitute {{{x}}}

{{{(y+2)y=728}}}

{{{y^2+2y=728}}}

{{{y^2+2y=728}}}

{{{y^2+2y-728=0}}}

{{{y^2+2y-728=0}}}

{{{y=(-2+-sqrt(2^2-4*1(-728)))/(2*1)}}}

{{{y=(-2+-sqrt(2916))/2}}}

{{{y=(-2+-54)/2}}}...take only positive  solution

{{{y=(-2+54)/2}}}

{{{y = 26}}}

{{{x=26+2}}}

{{{x=28}}}

  there are {{{28}}} rows, and {{{26}}} trees per row