document.write( "Question 851082: The hypotenuse of a right triangle is 75 inches long. One leg is 5 inch(es) longer than the other. Find the lengths of the legs of the triangle. Round your answers to the nearest tenth of an inch. \n" ); document.write( "
Algebra.Com's Answer #512585 by ramkikk66(644)\"\" \"About 
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document.write( "The hypotenuse of a right triangle is 75 inches long. One leg is 5 inch(es) longer than the other. Find the lengths of the legs of the triangle. Round your answers to the nearest tenth of an inch.\r\n" );
document.write( "Solution:\r\n" );
document.write( "Let the shortest side be x\r\n" );
document.write( "Then the second side is x + 5\r\n" );
document.write( "And the hypotenuse is 75 in. long.\r\n" );
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document.write( "Applying Pythagoras theorem,\r\n" );
document.write( "\"x%5E2+%2B+%28x+%2B+5%29%5E2+=+75%5E2\"\r\n" );
document.write( "\"x%5E2+%2B+x%5E2+%2B+10%2Ax+%2B+25+=+5625\"\r\n" );
document.write( "i.e. \"2%2Ax%5E2+%2B+10%2Ax+-+5600+=+0\" or Dividing it by 2 throughout\r\n" );
document.write( "\"x%5E2+%2B+5%2Ax+-+2800+=+0\"\r\n" );
document.write( "This can be solved using the quadratic solver as shown below.\r\n" );
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Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation \"ax%5E2%2Bbx%2Bc=0\" (in our case \"1x%5E2%2B5x%2B-2800+=+0\") has the following solutons:\r\n" ); document.write( " \r\n" ); document.write( " \"x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca\"\r\n" ); document.write( " \r\n" ); document.write( " For these solutions to exist, the discriminant \"b%5E2-4ac\" should not be a negative number.\r\n" ); document.write( " \r\n" ); document.write( " First, we need to compute the discriminant \"b%5E2-4ac\": \"b%5E2-4ac=%285%29%5E2-4%2A1%2A-2800=11225\".\r\n" ); document.write( " \r\n" ); document.write( " Discriminant d=11225 is greater than zero. That means that there are two solutions: \"+x%5B12%5D+=+%28-5%2B-sqrt%28+11225+%29%29%2F2%5Ca\".\r\n" ); document.write( " \r\n" ); document.write( " \"x%5B1%5D+=+%28-%285%29%2Bsqrt%28+11225+%29%29%2F2%5C1+=+50.4740502510427\"\r\n" ); document.write( " \"x%5B2%5D+=+%28-%285%29-sqrt%28+11225+%29%29%2F2%5C1+=+-55.4740502510427\"\r\n" ); document.write( " \r\n" ); document.write( " Quadratic expression \"1x%5E2%2B5x%2B-2800\" can be factored:\r\n" ); document.write( " \"1x%5E2%2B5x%2B-2800+=+1%28x-50.4740502510427%29%2A%28x--55.4740502510427%29\"\r\n" ); document.write( " Again, the answer is: 50.4740502510427, -55.4740502510427.\n" ); document.write( "Here's your graph:\n" ); document.write( "\n" ); document.write( "\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+1%2Ax%5E2%2B5%2Ax%2B-2800+%29\"
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