document.write( "Question 690977: Solve. include approximations to the nearest thousandth.\r
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document.write( "ln(x-6)+ln(x+5)=ln42 \n" );
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Algebra.Com's Answer #426454 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "ln(x-6)+ln(x+5)=ln42\r \n" ); document.write( "\n" ); document.write( "ln[(x-6)(x+5)] = ln42 \n" ); document.write( "(x-6)(x+5) = 42 \n" ); document.write( "x^2+5x-6x-30 = 42 \n" ); document.write( "x^2-x-30 = 42 \n" ); document.write( "x^2-x-72 = 0 \n" ); document.write( "(x+8)(x-9) = 0 \n" ); document.write( "x = {-8, 9} \n" ); document.write( "The negative solution is extraneous throw it out leaving: \n" ); document.write( "x = 9 \n" ); document.write( "or, to the nearest thousandth: \n" ); document.write( "x = 9.00 \n" ); document.write( " \n" ); document.write( " |