document.write( "Question 334236: Find the vertex, line of symestry, and the line of symmestry, and the maximum or minimum value of
\n" ); document.write( "fx)=-x^2+12x+3 \n" ); document.write( "

Algebra.Com's Answer #240354 by Fombitz(32388) $\"\"$ $\"About$

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Convert to vertex form, $\"y=a%28x-h%29%5E2%2Bk\"$ where (h,k) is the vertex.
\n" ); document.write( " $\"y=-x%5E2%2B12x%2B3\"$
\n" ); document.write( " $\"y=-%28x%5E2-12x%2B36%29%2B3%2B36\"$
\n" ); document.write( " $\"y=-%28x-6%29%5E2%2B39\"$
\n" ); document.write( "The vertex is ( $\"6\"$ , $\"39\"$ ).
\n" ); document.write( "The vertex lies on the axis of symmetry, $\"x=6\"$
\n" ); document.write( "The parabola opens downwards since the coefficient of the $\"x%5E2\"$ term is negative and the vertex value is a maximum.
\n" ); document.write( " $\"ymax=39\"$
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