Factor the Trinomial Completely $49 x ^ { 2 } - 84 x + 36$

Multiple Choice

Factor the trinomial completely.
- $49 x ^ { 2 } - 84 x + 36$

A) (7x - 6) (7x + 6)
B) $( 7 x - 6 ) ^ { 2 }$
C) $( 7 x + 6 ) ^ { 2 }$
D) (49x + 1) (x + 36)