Question 1153026
Let {{{ n }}} = the number of trees per row
{{{ n + 4 }}} = the number of rows
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{{{ n*( n + 4 ) = 672 }}}
{{{ n^2 + 4n - 672 = 0 }}}
I notice that {{{ 24*28 = 672 }}}
{{{ ( n + 28 )*( n - 24 ) = 672 }}}
{{{ n = 24 }}}
and
{{{ n + 4 = 28 }}}
There are 24 trees per row