document.write( "Question 980868: One number is one less than twice another, and the difference between squares is 16, find the numbers
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Algebra.Com's Answer #601982 by Cromlix(4381)![]() ![]() You can put this solution on YOUR website! Hi there, \n" ); document.write( "One number is one less than twice another \n" ); document.write( "Another = n \n" ); document.write( "One number = 1 - 2n \n" ); document.write( "the difference between squares is 16 \n" ); document.write( "(1 - 2n)^2 - (n)^2 = 16 \n" ); document.write( "(1 - 4n + 4n^2) - n^2 = 16 \n" ); document.write( "Collect like terms \n" ); document.write( "4n^2 - n^2 - 4n + 1 = 16 \n" ); document.write( "3n^2 - 4n - 15 = 0 \n" ); document.write( "Factorise \n" ); document.write( "(3n + 5)(n - 3) = 0 \n" ); document.write( "So, 3n + 5 = 0 \n" ); document.write( ".....n = -5/3 \n" ); document.write( ".....n - 3 = 0 \n" ); document.write( "......n = 3 \n" ); document.write( "Either n = -5/3 and other number = 13/3 \n" ); document.write( "or n = 3 and other number = - 5 \n" ); document.write( "Hope this helps:-) \n" ); document.write( " |