document.write( "Question 453070: Determine the larger root of the following equation:
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document.write( "log(z) + log(z + 19) = 2 log(z + 2). \r
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document.write( "(Please round your answer to two decimal places.)
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document.write( " Answer
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Algebra.Com's Answer #311364 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Determine the larger root of the following equation: \n" ); document.write( "log(z) + log(z + 19) = 2 log(z + 2). \n" ); document.write( ": \n" ); document.write( "log(z(z+19)) = 2 log(z+2) \n" ); document.write( ": \n" ); document.write( "log(z^2+19z) = log((z+2)^2) \n" ); document.write( "therefore \n" ); document.write( "z^2 + 19z = (z+2)^2 \n" ); document.write( "z^2 + 19z = z^2 + 4z + 4 \n" ); document.write( "z^2 - z^2 + 19z - 4z = 4 \n" ); document.write( "15z = 4 \n" ); document.write( "z = \n" ); document.write( "z = .267 is the only root \n" ); document.write( " |