Factor completely 3x2 - 21. 3(x2 - 7),3(x + 7)(x - 7),3(x + 7)(x - 3),Prime

Factor completely 3x2 - 21. 3(x2 - 7),3(x + 7)(x - 7),3(x + 7)(x - 3),

1.	Factor completely 3x2 - 21. 3(x2 - 7),3(x + 7)(x - 7),3(x + 7)(x - 3),Prime
Answer» Factor completely 3x²- 21. Solution: