document.write( "Question 507520: solve log(3x+4)=2log(x) \n" ); document.write( "

Algebra.Com's Answer #340512 by nerdybill(7384) $\"\"$ $\"About$

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log(3x+4)=2log(x)
\n" ); document.write( "log(3x+4)=log(x^2)
\n" ); document.write( "3x+4 = x^2
\n" ); document.write( "0 = x^2 - 3x - 4
\n" ); document.write( "0 = (x-4)(x+1)
\n" ); document.write( "x = {4, -1}
\n" ); document.write( "we can throw out the -1 solution (extraneous) leaving:
\n" ); document.write( "x = 4
\n" ); document.write( " \n" ); document.write( "

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