Write the Quadratic Function $f ( x ) = \frac { 1 } { 4 } \left( x ^ { 2 } + 8 x - 20 \right)$

Multiple Choice

Write the quadratic function $f ( x ) = \frac { 1 } { 4 } \left( x ^ { 2 } + 8 x - 20 \right)$ in standard form.

A) $f ( x ) = \frac { 1 } { 4 } ( x + 4 ) ^ { 2 } - 9$
B) $f ( x ) = \frac { 1 } { 4 } ( x - 9 ) ^ { 2 } + 4$
C) $f ( x ) = \frac { 1 } { 4 } ( x - 4 ) ^ { 2 } + 9$
D) $f ( x ) = - \frac { 1 } { 9 } ( x + 4 ) ^ { 2 } - 9$
E) $f ( x ) = - \frac { 1 } { 9 } ( x - 4 ) ^ { 2 } - 9$