document.write( "Question 129847: Squareroot of 2x-5 + squareroot of 9+x=13\r
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document.write( "I square both sides and get 2x-5+9+x=169 and solve x=55 but it's wrong. What am I missing? Thanks for your help! \n" );
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Algebra.Com's Answer #94818 by oscargut(2103) You can put this solution on YOUR website! (a+b)^2=a^2+2ab+b^2\r \n" ); document.write( "\n" ); document.write( "so \r \n" ); document.write( "\n" ); document.write( "sqrt(2x-5)+sqrt(9+x)=13\r \n" ); document.write( "\n" ); document.write( "2x-5+2sqrt(2x-5)sqrt(9+x)+9+x=169\r \n" ); document.write( "\n" ); document.write( "3x+4+2sqrt(2x-5)sqrt(9+x)=169\r \n" ); document.write( "\n" ); document.write( "3x-165 = -2sqrt(2x-5)sqrt(9+x)\r \n" ); document.write( "\n" ); document.write( "(3x-165)^2=4(2x-5)(9+x)\r \n" ); document.write( "\n" ); document.write( "if you need the rest please contact me\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |