document.write( "Question 1095691: Two positive numbers, which have a difference of 3, are squared. The difference in the results is 81. Find the two numbers with working. \n" ); document.write( "
Algebra.Com's Answer #710210 by Theo(13342)![]() ![]() You can put this solution on YOUR website! let a be the larger number \n" ); document.write( "let b be the smaller number\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a - b = 3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a^2 - b^2 = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since a^2 - b^2 is equal to (a - b) * (a + b), then:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(a - b) * (a + b) = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since a - b = 3, then:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3 * (a + b) = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since a - b = 3, then a = b + 3 then:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3 * (a + b) = 81 becomes 3 * (b + 3 + b) = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "simplify to get 3 * (2b + 3) = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "simplify further to get 6b + 9 = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for b to get b = (81 - 9) / 6 = 12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since a = b + 3, then a = 15\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "your larger number is 15 and your smaller number is 12.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "15 - 12 = 3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "15^2 - 12^2 = 225 - 144 = 81\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "your solution is that the two number are 15 and 12.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |