Factor by Grouping
- $x ^ { 3 } - 4 x ^ { 2 } - 3 x + 12$

Factor by Grouping
- $x ^ { 3 } - 4 x ^ { 2 } - 3 x + 12$

A) $( x - 4 ) \left( x ^ { 2 } - 3 \right)$
B) $( x - 3 ) \left( x ^ { 2 } - 4 \right)$
C) $( x + 4 ) \left( x ^ { 2 } + 3 \right)$
D) $( x - 4 ) ( x - 3 )$