document.write( "Question 645343: The perimiter of a rectangle is 30m.
\n" ); document.write( "It's area is 56m2.
\n" ); document.write( "What is its length?
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Algebra.Com's Answer #405501 by ankor@dixie-net.com(22740)\"\" \"About 
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The perimeter of a rectangle is 30m.
\n" ); document.write( "2L + 2W = 30
\n" ); document.write( "Simplify, divide by 2
\n" ); document.write( "L + W = 15
\n" ); document.write( "W = (15-L)
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\n" ); document.write( "It's area is 56m2.
\n" ); document.write( "L*W = 56
\n" ); document.write( "Replace W with (15-L)
\n" ); document.write( "L(15-L) = 56
\n" ); document.write( "15L - L^2 = 56
\n" ); document.write( "Form a quadratic equation on the right
\n" ); document.write( "0 = L^2 - 15L + 56
\n" ); document.write( "Factors to
\n" ); document.write( "(L-7)(L-8) = 56
\n" ); document.write( "Two solutions
\n" ); document.write( "L = 7; then W = 8
\n" ); document.write( "L = 8; then W = 7\r
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