document.write( "Question 25389: How do I solve this one:
\n" ); document.write( "Sally was making a peanut butter and jelly sandwich. Sally cut off 1cm off each edge of the bread. If the bread is a square and the area removed was 32 cm^2 what is the length of a side of the sandwich (now that the 1 cm was removed)\r
\n" ); document.write( "\n" ); document.write( "I have tried using (x-1)(x-1) = 32 cm, but I already have been told an answer of \"7\" by my teacher. I cannot get the quadratic equation, when the coefficients are plugged in, to work and render '7'. Thanks.
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #13605 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Let each side of the original sandwich have length \"x\".
\n" ); document.write( "When the 1cm is removed on all four sides the remaining
\n" ); document.write( "square has four sides that are x-2 cm long.
\n" ); document.write( "The area of the original sandwich is x^2.
\n" ); document.write( "the area of the remaining sandwich is (x-2)^2
\n" ); document.write( "EQUATION:
\n" ); document.write( "Original sandwich - New sandwich = 32 sq. cm.
\n" ); document.write( "x^2- (x-2)^2 = 32
\n" ); document.write( "x^2-x^2+4x-4=32
\n" ); document.write( " 4x=36
\n" ); document.write( " x=9 cm (side of original sandwich before cutting)
\n" ); document.write( "x-2=7 cm (side of sandwich after cutting)\r
\n" ); document.write( "\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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