document.write( "Question 1054231: A rectangular piece of cardboard 11 inches by 14 inches is made into a box by cutting identical squares from each corner and folding up the sides. If the bottom of the box turns out to have an area of 80 in^2, what size squares were cut from the corners?\r
\n" ); document.write( "\n" ); document.write( "The equation I am coming up with does not give me an answer that would fit.
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Algebra.Com's Answer #669437 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
So you fold up a square of size, X, from each edge.
\n" ); document.write( "Let's call the left over part A on the width and B on the length so that,
\n" ); document.write( "\"X%2BA%2BX=11\"
\n" ); document.write( "\"X%2BB%2BX=14\"
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "\"2X%2BA=11\"
\n" ); document.write( "\"2X%2BB=14\"
\n" ); document.write( "and the area of the bottom,
\n" ); document.write( "\"AB=80\"
\n" ); document.write( "So from the length and width,
\n" ); document.write( "\"A=11-2X\"
\n" ); document.write( "\"B=14-2X\"
\n" ); document.write( "Substituting,
\n" ); document.write( "\"%2811-2X%29%2814-2X%29=80\"
\n" ); document.write( "\"4X%5E2-50X%2B154=80\"
\n" ); document.write( "\"4X%5E2-50X%2B74=0\"
\n" ); document.write( "\"2X%5E2-25X%2B37=0\"
\n" ); document.write( "Complete the square,
\n" ); document.write( "\"2%28X%5E2-%2825%2F2%29X%29%2B37=0\"
\n" ); document.write( "\"2%28X%5E2-%2825%2F2%29X%2B%2825%2F4%29%5E2%29%2B37=2%2825%2F4%29%5E2\"
\n" ); document.write( "\"%28X-%2825%2F4%29%29%5E2=625%2F16-296%2F16\"
\n" ); document.write( "\"%28X-%2825%2F4%29%29%5E2=329%2F16\"
\n" ); document.write( "\"X-25%2F4=0+%2B-sqrt%28329%29%2F4\"
\n" ); document.write( "\"X=25%2F4+%2B-+sqrt%28329%29%2F4\"
\n" ); document.write( "Although there are two answers, we are limited by,
\n" ); document.write( "\"A%3E0\"
\n" ); document.write( "\"B%3E0\"
\n" ); document.write( "which leads to the solution,
\n" ); document.write( "\"X=25%2F4-sqrt%28329%29%2F4\"
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