document.write( "Question 607150: solve log x+log(x+21)=2 \n" ); document.write( "

Algebra.Com's Answer #382444 by Gogonati(855) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"log%28x%28x%2B21%29%29=log100\"$
\n" ); document.write( " $\"x%5E2%2B21x=100\"$
\n" ); document.write( " $\"x%5E2%2B21x-100=%28x%2B25%29%28x-4%29=0\"$ \r
\n" ); document.write( "\n" ); document.write( "The solution set is: {4}\r
\n" ); document.write( "\n" ); document.write( " We extract -25 because the neg log does not exist.\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );