Question 1016973
You need to find the length, width, and
height of thr box
The height is going to be {{{ 2 }}} in because 
that's what you get when you fold up the
sides to make the box
Let {{{ x }}} = the length
of the sides of the cardboard
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To find the width of the box, 
you must subtract {{{ 2 }}} in
from both sides, so
Width of box = {{{ x - 4 }}} in
The same is true for 
the length of the box
Length of box = {{{ x - 4 }}} in
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I will say that:
{{{ y = x - 4 }}}
Now I can say:
{{{ 1682 = 2y^2 }}}
{{{ y^2 = 841 }}}
{{{ y = 29 }}}
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{{{ y = x - 4 }}}
{{{ 29 = x - 4 }}}
{{{ x = 33 }}}
The cardboard is 33" x 33"
check:
{{{ 1682 = 2*29*29 }}}
{{{ 1682 = 1682 }}}
OK