document.write( "Question 686836: log x+ log (x-1)=log 30 \n" ); document.write( "

Algebra.Com's Answer #424916 by nerdybill(7384) $\"\"$ $\"About$

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log x + log (x-1)=log 30
\n" ); document.write( "log x(x-1)=log 30
\n" ); document.write( "x(x-1)= 30
\n" ); document.write( "x^2-x = 30
\n" ); document.write( "x^2-x-30 = 0
\n" ); document.write( "(x+5)(x-6) = 0
\n" ); document.write( "x = {-5. 6}
\n" ); document.write( "we can throw out the negative solution (extraneous) leaving:
\n" ); document.write( "x = 6 \n" ); document.write( "

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