Answer:
±1, ±2, ±2/3, ±1/3
or
1,2,2/3,1/3,-1,-2,-2/3,-1/3
Explanation:
Start by listing all the factors of the y intercept (in this case 2)
1,2
Then list out all the factors of the coefficent with the highest degree (3 in this case)
1,3
You're then supposed to divide all possible pairs
so all the possible zeroes are
±1, ±2, ±2/3, ±1/3