document.write( "Question 91796: Find two factors of 28 with a sum of 11. \n" ); document.write( "
Algebra.Com's Answer #66683 by mathispowerful(115)\"\" \"About 
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according to the problem:\r
\n" ); document.write( "\n" ); document.write( "assume the two factors are x and y\r
\n" ); document.write( "\n" ); document.write( "then x + y = 11
\n" ); document.write( " x*y = 28\r
\n" ); document.write( "\n" ); document.write( "a quadratic equation can be formed:\r
\n" ); document.write( "\n" ); document.write( "from the first equation y = 11 - x
\n" ); document.write( "substitute y: \r
\n" ); document.write( "\n" ); document.write( "\"x%2A%2811+-+x%29=+28\"\r
\n" ); document.write( "\n" ); document.write( "\"11x+-+x%5E2+=+28\"\r
\n" ); document.write( "\n" ); document.write( "or \"x%5E2+-+11x+%2B28+=+0\"\r
\n" ); document.write( "\n" ); document.write( "solve this equation: (x -4)(x - 7) = 0\r
\n" ); document.write( "\n" ); document.write( "so x = 4 and x = 7
\n" ); document.write( "the corresponding y values are y =7 and y = 4.\r
\n" ); document.write( "\n" ); document.write( "The answer the two factors are 4 and 7.
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