document.write( "Question 983408: A page with length 3 cm longer than its width has 80 cm^2 of printed area. The margins at the top and bottom are each 3/2 cm and the side margins are each 1 cm. Find the dimensions of the page. \n" ); document.write( "
Algebra.Com's Answer #604190 by josgarithmetic(39620)\"\" \"About 
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w for width
\n" ); document.write( "L for length\r
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\n" ); document.write( "\n" ); document.write( "\"L=w%2B3\"\r
\n" ); document.write( "\n" ); document.write( "Length of printing, \"L-2%2A1\"
\n" ); document.write( "Width of printing, \"w-2%283%2F2%29=w-3\"\r
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\n" ); document.write( "\n" ); document.write( "Printed Area, \"%28L-2%29%28w-3%29=80\"
\n" ); document.write( "Substitute for L.
\n" ); document.write( "\"%28w%2B3-2%29%28w-3%29=80\"
\n" ); document.write( "\"%28w%2B1%29%28w-3%29=80\"
\n" ); document.write( "\"w%5E2-2w-3-80=0\"
\n" ); document.write( "\"highlight_green%28w%5E2-2w-83=0%29\"-----not seem factorable.\r
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\n" ); document.write( "\n" ); document.write( "Discriminant: \"4%2B4%2A83=336\"
\n" ); document.write( "\"336=12%2A28=2%2A2%2A3%2A4%2A7=2%5E4%2A3%2A7=2%5E4%2A21\"\r
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\n" ); document.write( "\n" ); document.write( "\"w=%282%2B-+sqrt%282%5E4%2A21%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"w=%282%2B-+4%2Asqrt%2821%29%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"w=1%2B-+2sqrt%2821%29\"\r
\n" ); document.write( "\n" ); document.write( "Only the PLUS form can be accepted.
\n" ); document.write( "\"highlight%28highlight%28w=1%2B2sqrt%2821%29%29%29\"
\n" ); document.write( "Find L from this value for w.
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