Write the Function in the Form $f ( x ) = a ( x - h ) ^ { 2 } + k$

Multiple Choice

Write the function in the form $f ( x ) = a ( x - h ) ^ { 2 } + k$ by completing the square. $f ( x ) = x ^ { 2 } + 20 x - 6$

A) $f ( x ) = ( x - 20 ) ^ { 2 } + 6$
B) $f ( x ) = ( x + 20 ) ^ { 2 } - 6$
C) $f ( x ) = ( x - 10 ) ^ { 2 } + \frac { 11 } { 4 }$
D) $f ( x ) = ( x + 10 ) ^ { 2 } - 106$