document.write( "Question 865865: Hi what's the domain of log(e^(2x) - 3e^x -4).
\n" ); document.write( " e^(2x) - 3e^x -4>0 --> e^x = t
\n" ); document.write( " t^2-3t-4>0
\n" ); document.write( " t=(3+19^(1/2))/-8 --> (3+19^(1/2))/-8 = e^x
\n" ); document.write( " How can I continue? thanks \n" ); document.write( "

Algebra.Com's Answer #521927 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Not sure how you got from line 3 to line 4.
\n" ); document.write( " $\"t%5E2-3t-4%3E0\"$
\n" ); document.write( " $\"%28t-4%29%28t%2B1%29%3E0\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C%28x-4%29%28x%2B1%29%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( " $\"t-4%3E0\"$ and $\"t%2B1%3C0\"$
\n" ); document.write( " $\"t%3E4\"$ and $\"t%3C-1\"$
\n" ); document.write( " $\"e%5Ex%3E4\"$ and $\"e%5Ex%3C-1\"$
\n" ); document.write( "The second solution is not possible so we discard it.
\n" ); document.write( " $\"e%5Ex%3E4\"$
\n" ); document.write( " $\"x%3Eln%284%29\"$
\n" ); document.write( " \n" ); document.write( "

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