document.write( "Question 340367: If length is made 100 feet longer, by how many square feet will the area be increased?\r
\n" ); document.write( "\n" ); document.write( "area = Length (x) x width (y)
\n" ); document.write( "area = x x y, area = xy
\n" ); document.write( "area = (x + 100) x y = xy + 100
\n" ); document.write( "area is increased by 100\r
\n" ); document.write( "\n" ); document.write( "am I correct?
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Algebra.Com's Answer #243861 by vleith(2983)\"\" \"About 
You can put this solution on YOUR website!
Assume a rectanglular shape\r
\n" ); document.write( "\n" ); document.write( "We know that the largest rectabgle area for a given perimeter is a square.\r
\n" ); document.write( "\n" ); document.write( "\"Area+=+x+%2A+y\"
\n" ); document.write( "\"AreaSquare+=+x%5E2\"
\n" ); document.write( "Add in 100 more feet of perimeter.
\n" ); document.write( "100/4 means each side of the square is now 25 feet longer than before.
\n" ); document.write( "\"NewAreaSquare+=+%28x%2B25%29%5E2\"
\n" ); document.write( "\"NewArea+=+x%5E2+%2B+50x+%2B+625\"
\n" ); document.write( "Difference is then \"50x%2B625\"
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