document.write( "Question 1140879: If I am to solve for x on this particular rational expression, then what would be the solution?\r
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document.write( "Here is the following expression: https://i.imgur.com/CNjknsR.png \n" );
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Algebra.Com's Answer #761390 by Theo(13342)![]() ![]() You can put this solution on YOUR website! from what i can tell, there is no solution to this problem.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x can't be + 2 and x can't be -2 because that would make the denominator equal to 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x^2 - 4 is equal to (x + 2) * (x - 2), so x = + 2 and x = - 2 is not allowed on either side of the equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the solution, if any, has to be something other than x = + 2 or x = - 2.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "i solved in the following manner.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "start with x / (x + 2) - x / (x - 2) = (x^2 + 4) / (x^2 - 4)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "since (x^2 - 4) = (x + 2) * (x - 2), the equation becomes:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x / (x + 2) - x / (x - 2) = (x^2 + 4) / ((X - 2) * (X + 2))\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "multiply both sides of the equation by (x - 2) * (x + 2) to get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x * (x - 2) - x * (x + 2) = x^2 + 4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "simplify to get x^2 - 2x - x^2 - 2x = x^2 + 4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "combine like terms to get -4x = x^2 + 4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "add 4x to both sides of the eqution to get 0 = x^2 + 4x + 4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "factor to get 0 = (x + 2) * (x + 2)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "solve for x to get x = -2.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "but x = -2 is not allowed because that would make the denominator in the original equation undefined.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "therefore, there is no solution to the problem as far as i can see.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |