document.write( "Question 49205: Could someone help me with this please. Word problems. Geometry\r
\n" ); document.write( "\n" ); document.write( "Geometry: The length of a rectangle is 1 cm longer than it's width. If the diagonal of the rectangle is 4 cm, what are the dimensions (the length and the width) of the rectangle?
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Algebra.Com's Answer #32623 by Earlsdon(6294)\"\" \"About 
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Let the length of the rectangle be L and its width be W.
\n" ); document.write( "The length, L, is 1 cm longer than the width, W, so L = W+1
\n" ); document.write( "The sides of the rectangle can be written in terms of the width: L=(W+1) and W=(W).
\n" ); document.write( "The diagonal of the rectangle forms the hypotenuse (c) of a right triangle whose sides are (W+1) and (W).\r
\n" ); document.write( "\n" ); document.write( "Using the Pythagorean theorem: \"c%5E2+=+a%5E2%2Bb%5E2\", you can find W:\r
\n" ); document.write( "\n" ); document.write( "\"4%5E2+=+%28W%2B1%29%5E2+%2B+W%5E2\" Simplify.
\n" ); document.write( "\"16+=+W%5E2%2B2W%2B1+%2B+W%5E2\" Collect like-terms.
\n" ); document.write( "\"2W%5E2%2B2W%2B1+=+16\" Subtract 16 from both sides of the equation.
\n" ); document.write( "\"2W%5E2%2B2W-15+=+0\" Use the quadratic formula to solve: \"W=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a\"\r
\n" ); document.write( "\n" ); document.write( "\"W+=+%28-2%2B-sqrt%282%5E2-4%282%29%28-15%29%29%29%2F2%282%29\"
\n" ); document.write( "\"W+=+%28-2%2B-sqrt%284%2B120%29%29%2F4\"
\n" ); document.write( "\"W+=+%28-2%2B-sqrt%28124%29%29%2F4\"
\n" ); document.write( "\"W+=+%28-2%2B-2sqrt%2831%29%29%2F4\"
\n" ); document.write( "\"W+=+-1%2F2-%281%2F2%29sqrt%2831%29\" Discard this solution as the width must be a positive number.
\n" ); document.write( "\"W+=+-1%2F2+%2B+%281%2F2%29sqrt%2831%29\"\r
\n" ); document.write( "\n" ); document.write( "For an approximate answer:
\n" ); document.write( "\"W+=+-1%2F2%2B%281%2F2%29%285.57%29\"
\n" ); document.write( "\"W+=+2.28\"cm
\n" ); document.write( "\"L+=+W%2B1\"
\n" ); document.write( "\"L+=+3.28\"cm
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