Question 345524
For a rectangle,
{{{A=L*W=143}}}
.
.
{{{L=W+2}}}
Substitute,
{{{(W+2)*W=143}}}
{{{W^2+2W=143}}}
{{{W^2+2W-143=0}}}
{{{(W-11)(W+13)=0}}}
Only use the positive solution,
{{{W-11=0}}}
{{{W=11}}}
{{{L=W+2=13}}}
The window is 11' wide and 13' long.