document.write( "Question 337530: f(x) = -2x2 + 8x -1 find the cooordinates of the vertex for the parabola defined by the given quadratic function. \n" ); document.write( "

Algebra.Com's Answer #241912 by Fombitz(32388) $\"\"$ $\"About$

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Complete the square to convert to vertex form, $\"y=a%28x-h%29%5E2%2Bk\"$ where ( $\"h\"$ , $\"k\"$ ) is the vertex.
\n" ); document.write( " $\"f%28x%29=-2x%5E2%2B8x-1\"$
\n" ); document.write( " $\"f%28x%29=-2%28x%5E2-4x%29-1\"$
\n" ); document.write( " $\"f%28x%29=-2%28x%5E2-4x%2B4%29-1%2B8\"$
\n" ); document.write( " $\"f%28x%29=-2%28x-2%29%5E2%2B7\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Vertex:( $\"2\"$ , $\"7\"$ )
\n" ); document.write( " \n" ); document.write( "

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