document.write( "Question 691758: log(x-1)+log(x+1)=Log(x+2)^2 \n" ); document.write( "

Algebra.Com's Answer #426854 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
log(x-1)+log(x+1)=Log(x+2)^2
\n" ); document.write( "-------
\n" ); document.write( "log[(x-1)(x+1)] = log(x+2)^2
\n" ); document.write( "---
\n" ); document.write( "x^2-1 = (x+2)^2
\n" ); document.write( "---
\n" ); document.write( "x^2-1 = x^2 + 4x + 4
\n" ); document.write( "---
\n" ); document.write( "4x = -5
\n" ); document.write( "x = -5/4
\n" ); document.write( "----
\n" ); document.write( "Result: No solution as that solution is extraneous.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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