the 0.9 = 0.999....9 is right, because the same digit is put in the end, so it really doesn't matter. To bring it back to SeedRankLou's point, it's just redundant to say it.

A slightly better example would be 0.127 (127/999). The result would be 0.127...12, or 0.127..13, if you were to round it, that is.

Of course that's due to rounding. You never put digits after the repeating digits, so it's logically wrong, not a matter of subjective thinking.

edit: Arche just answered it, so um...factor x2 + 2x + 2 . Or show me the graph, I don't really care.