document.write( "Question 1061106: How do you solve this?
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document.write( "2log3 X-log3(X+4) = 2
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Algebra.Com's Answer #675936 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! 2log3 X-log3(X+4) = 2 \n" ); document.write( ": \n" ); document.write( "log(3) (x^2 / (x+4)) = 2 \n" ); document.write( ": \n" ); document.write( "Note that 2log(3) x = log(3) x^2, also used log definition of division \n" ); document.write( ": \n" ); document.write( "x^2 / (x+4) = 3^2 = 9 \n" ); document.write( ": \n" ); document.write( "Note used definition of logarithm \n" ); document.write( ": \n" ); document.write( "x^2 = 9(x+4) \n" ); document.write( ": \n" ); document.write( "x^2 -9x -36 = 0 \n" ); document.write( ": \n" ); document.write( "(x+3) * (x-12) = 0 \n" ); document.write( ": \n" ); document.write( "****************************************************** \n" ); document.write( "x = 12 \n" ); document.write( ": \n" ); document.write( "Note the logarithm of a negative number is not defined \n" ); document.write( "****************************************************** \n" ); document.write( ":\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |