document.write( "Question 931627: Solve equation Logarithm
\n" ); document.write( "\"log%285%2Cx%5E2%2Bx%2B4%29=2\"
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Algebra.Com's Answer #565689 by MathLover1(20850)\"\" \"About 
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\"log%285%2C%28x%5E2%2Bx%2B4%29%29=2\"....convert to log base \"10\"\r
\n" ); document.write( "\n" ); document.write( "\"log%28%28x%5E2%2Bx%2B4%29%29%2Flog%285%29=2\"\r
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\n" ); document.write( "\n" ); document.write( "\"log%28%28x%5E2%2Bx%2B4%29%29=2log%285%29\"\r
\n" ); document.write( "\n" ); document.write( "\"log%28%28x%5E2%2Bx%2B4%29%29=log%285%5E2%29\"....if log same, then\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5E2%2Bx%2B4%29=5%5E2\" is same too; solve for \"x\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2Bx%2B4=25\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2Bx%2B4-25=0\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2Bx-21=0\"...use quadratic formula\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B-+sqrt%28+1%5E2-4%2A1%2A%28-21%29+%29%29%2F%282%2A1%29+\" \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B-+sqrt%28+1%2B84+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B-+sqrt%28+85+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B-+sqrt%28+85+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "exact solutions will be:\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B+sqrt%28+85+%29%29%2F2+\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+-+sqrt%28+85+%29%29%2F2+\"\r
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\n" ); document.write( "\n" ); document.write( "decimal solutions are:\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B+sqrt%28+85+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+%2B+9.219544457292887%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+8.219544457292887%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=4.109772228646444\" exact decimal solution\r
\n" ); document.write( "\n" ); document.write( "\"x+=4.11\" approximate \r
\n" ); document.write( "\n" ); document.write( "or\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+-+sqrt%28+85+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-1+-9.219544457292887%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+-10.219544457292887%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=-5.10977222864644\" exact decimal solution\r
\n" ); document.write( "\n" ); document.write( "\"x+=-5.11\" approximate \r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-7%2C+7%2C+-5%2C+7%2C+log%285%2C%28x%5E2%2Bx%2B4%29%29%2C2%29+\" \r
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