document.write( "Question 297735: Solve
\n" ); document.write( "1. log2(4x + 1)= 5\r
\n" ); document.write( "\n" ); document.write( "2. log x + log(x + 3) = 10 \n" ); document.write( "
Algebra.Com's Answer #214361 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
The word \"log\" or \"ln\" means exponent or power.
\n" ); document.write( "When you see log2(x) = 3 it means 3 is the exponent of 2 that gives you x.
\n" ); document.write( "2^3 = x
\n" ); document.write( "x = 8
\n" ); document.write( "-------------------------
\n" ); document.write( "Now, for your problems: \r
\n" ); document.write( "\n" ); document.write( "Solve
\n" ); document.write( "1. log2(4x + 1)= 5
\n" ); document.write( "4x+1 = 2^5
\n" ); document.write( "4x+1 = 32
\n" ); document.write( "4x = 31
\n" ); document.write( "x = 31/4
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\n" ); document.write( "2. log x + log(x + 3) = 10
\n" ); document.write( "log[x(x+3)] = 10
\n" ); document.write( "x(x+3) = 10^10
\n" ); document.write( "x^2 + 3x = 10*10
\n" ); document.write( "x^2 + 3x - 10^10 = 0
\n" ); document.write( "Use the quadratic formula to find a positive solution.
\n" ); document.write( "==============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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