document.write( "Question 825847: The length and width of a rectangular sheet of plywood is 4 ft. by 8 ft, how much must be added equally to the length and width to double the area? (Answer to the nearest tenth of a foot.)
\n" ); document.write( "Let x = the amount added
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Algebra.Com's Answer #497637 by josgarithmetic(39617)\"\" \"About 
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\"4%2A8=32%2Aft%5E2\" original area.
\n" ); document.write( "Doubled area wanted is \"2%2A32=64%2Aft%5E2\".\r
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\n" ); document.write( "\n" ); document.write( "Increase both dimensions each by x.
\n" ); document.write( "\"%28x%2B4%29%28x%2B8%29=64\"
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\n" ); document.write( "\"x%5E2%2B12x%2B32=64\"
\n" ); document.write( "\"x%5E2%2B12x-32=0\"....... Is this factorable or not? If not, use general solution to a quadratic equation.
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