Solve the Problem $f ( x ) = x ^ { 2 } + x - 12$

Multiple Choice

Solve the problem.
-Let $f ( x ) = x ^ { 2 } + x - 12$ . Find all values $x$ for which $f ( x ) = 0$ .

A) $- 3,4$
B) $- 4,3$
C) $- 4 , - 3$
D) 3,4