document.write( "Question 1123833: The length of a rectangle is
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Algebra.Com's Answer #740199 by ikleyn(52786) $\"\"$ $\"About$

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document.write( "Let W be the width.\r\n" );
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document.write( "Then the length is L = 2W - 4,  and the area is W*L = W*(2W-4).\r\n" );
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document.write( "Your equation is\r\n" );
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document.write( "W*(2W-4) = 286,    or\r\n" );
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document.write( "W*(W-2) = 143.\r\n" );
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document.write( "You can solve this quadratic equation using the quadratic formula,\r\n" );
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document.write( "or you can mentally find decomposition of the number 143 into the product of two positive integers that differ by 2:  143 = 11*13.\r\n" );
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document.write( "Answer.  W = 13 (the width);  L = 2*W - 4 = 2*13-4 = 22 (the length).\r\n" );
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document.write( "Check.   11*18 = 286 square meters.   ! Correct !\r\n" );
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