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document.write( "For enrichment, here is a different approach.\r\n" );
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document.write( "Let the width of the strip be x. \r\n" );
document.write( "The area of the floor is 27x35 = 945, and the area of the rug is 609,\r\n" );
document.write( "So the total area of the strip is 945-609 = 336\r\n" );
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document.write( "As you see from the drawing above, the strip is made up of two\r\n" );
document.write( "vertical 27-x by x thin rectangles and vertical two horizontal\r\n" );
document.write( "rectangles. So we have the equation:\r\n" );
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document.write( "Divide through by -4\r\n" );
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document.write( "That's the same quadratic equation the other tutors got, so the\r\n" );
document.write( "rest is the same as theirs. I'll stop here.\r\n" );
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document.write( "Edwin
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