c²-4 Which expression is equivalent to c+3 O C+3 C+2 ²-4 3(²-9 닌 c²-4 C+3 c²-4 C+3 3 (c²-9) C+2 3(c²-9) C+3 C+2 2 c²-4 3 c²-g 2 9 3[c²-9) ²​