document.write( "Question 449843: log2(x+2)+log2(x-2)=5 \n" ); document.write( "

Algebra.Com's Answer #309399 by robertb(5830) $\"\"$ $\"About$

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$\"log%282%2C%28x%2B2%29%29%2Blog%282%2C%28x-2%29%29=5\"$ \r
\n" ); document.write( "\n" ); document.write( "<==> $\"log%282%2C+%28%28x%2B2%29%28x-2%29%29%29+=+5\"$ \r
\n" ); document.write( "\n" ); document.write( "<==> $\"2%5E5+=+x%5E2+-+4\"$ \r
\n" ); document.write( "\n" ); document.write( "<==> $\"36+=+x%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( "<==> x = 6, or x = -6. \r
\n" ); document.write( "\n" ); document.write( "The second x-value won't satisfy the original equation, and so the final answer is x = 6. \n" ); document.write( "

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