Answer:
A.
Step-by-step explanation:
3x³ - 2x - 8 = 3x³ + 0x² - 2x - 8
x - 2 = 0
x = 2
2| 3 0 - 2 | - 8
3 . 2 = 6 6 . 2 = 12 | 10 . 2 = 20
----------------------------------------------------------------------------
3 0 + 6 = 6 - 2 + 12 = 10 | - 8 + 20 = 12