document.write( "Question 60835: Can someone please help me figure this out?\r
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document.write( "Find two consecutive positive integers such that the sum of their squares is 85. \n" );
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Algebra.Com's Answer #41817 by jai_kos(139)![]() ![]() ![]() You can put this solution on YOUR website! Let the two consecutive integer be x and x +1 \n" ); document.write( "Sum of their squares is 85. \n" ); document.write( "That means \n" ); document.write( "x^2 +( x +1)^2 = 85 \n" ); document.write( "x^2 +x^2 + 1 + 2x = 85 \n" ); document.write( "2x^2 +2x = 85 -1 \n" ); document.write( "2x^2 + 2x = 84 \n" ); document.write( "2x^2 + 2x -84 =0 \n" ); document.write( "Divide the above equation by 2, we get \n" ); document.write( "x^2 +x - 42 = 0 \n" ); document.write( "x^2 + 7x -6x – 42 =0 \n" ); document.write( "x(x +7) – 6 (x +7) = 0 \n" ); document.write( "(x - 6) (x + 7) = 0 \n" ); document.write( "x - 6 = 0 or x + 7 = 0 \n" ); document.write( "x = 6 or -7\r \n" ); document.write( "\n" ); document.write( "So when x = 6, we get (x+1) = 6 +1 = 7 \n" ); document.write( "So when x =-7, (x +1) = - 7 + 1 = - 6\r \n" ); document.write( "\n" ); document.write( "Therefore the consecutive numbers are 6,7 and -7 , 6 \n" ); document.write( " \n" ); document.write( " |