document.write( "Question 1200713: The area of this rug is 80 sq. units. Find its length and width. \r
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Algebra.Com's Answer #834910 by ikleyn(52777) $\"\"$ $\"About$

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document.write( "The area of this rug is the product of its dimensions\r\n" );
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document.write( "    (x+8)*(x-8) = x^2 - 64  square units.    \r\n" );
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document.write( "To find the dimensions, equate that expression to 80\r\n" );
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document.write( "    x^2 -64 = 80.\r\n" );
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document.write( "It gives\r\n" );
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document.write( "    x^2 = 80 + 64 = 144.\r\n" );
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document.write( "Then  x =  = 12  units.\r\n" );
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document.write( "Thus the dimensions are  (x+8) = 12+8 = 20 units  and  (x-8) = 12-8 = 4 units.     ANSWER\r\n" );
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document.write( "CHECK.  20*4 = 80,  the area.  ! correct !\r\n" );
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