document.write( "Question 145525: I need help solving this logarithmic equation:
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document.write( "log(x-1)+log(x+2)=2 \n" );
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Algebra.Com's Answer #106176 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! log(x-1)+log(x+2)=2 \n" ); document.write( "log[x^2+x-2] = 2 \n" ); document.write( "x^2+x-2 = 10^2 \n" ); document.write( "x^2+x-102 = 0 \n" ); document.write( "------ \n" ); document.write( "x = [-1 +- sqrt(1-4*1*-102)]/2\r \n" ); document.write( "\n" ); document.write( "x = [-1 +- sqrt(409)]/2\r \n" ); document.write( "\n" ); document.write( "x = [-1 +- 20.22]2 \n" ); document.write( "Positive solution: \n" ); document.write( "x = 9.612 \n" ); document.write( "========================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H.[ \n" ); document.write( " |