document.write( "Question 109696: find the equation of the axis of symmetry of the parabola f(x)=3x^2+24x+47 \n" ); document.write( "
Algebra.Com's Answer #79952 by jim_thompson5910(35256)\"\" \"About 
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To find the axis of symmetry, use this formula:\r
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\n" ); document.write( "\n" ); document.write( "\"x=-b%2F%282a%29\"\r
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\n" ); document.write( "\n" ); document.write( "From the equation \"y=3x%5E2%2B24x%2B47\" we can see that a=3 and b=24\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-24%29%2F%282%2A3%29\" Plug in b=24 and a=3\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-24%29%2F6\" Multiply 2 and 3 to get 6\r
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\n" ); document.write( "\n" ); document.write( "\"x=-4\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "So the axis of symmetry is \"x=-4\"
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