document.write( "Question 844947: Determine whether f(x)= -2x^2+12x+3 has a minimum or maximum value. Then find the minimum or maximum value. \n" ); document.write( "

Algebra.Com's Answer #509000 by Fombitz(32388) $\"\"$ $\"About$

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$\"+graph%28+300%2C+300%2C+-10%2C10%2C-5%2C25%2C-2x%5E2%2B12x%2B3%29+\"$
\n" ); document.write( "The max. occurs when $\"df%2Fdx=0\"$ .
\n" ); document.write( " $\"df%2Fdx=-4x%2B12=0\"$
\n" ); document.write( " $\"-4x=-12\"$
\n" ); document.write( " $\"x=3\"$
\n" ); document.write( " $\"f%283%29=-2%283%29%5E2%2B12%283%29%2B3\"$
\n" ); document.write( " $\"f%283%29=-18%2B36%2B3\"$
\n" ); document.write( " $\"f%283%29=21\"$ \n" ); document.write( "

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