6,9,12, is an example of an infinite arithmetic series. true or false?

As there are no constraints, and a series of periods is displayed after the beginning of the sequence, it is implied that the series is infinite.

True.

Step-by-step explanation:

Step 1   Given   0 times 2 = 0

Step 2 (-4+4)2=0

Step 3 Use The Distributive property

Step 5  Subtract 8 from both sides

Step 6      -4 times 2 = -8