County Antrim, "Aontroim" in Irish Gaelic is one of the six counties of Northern Ireland, covering an area of 2844 square km it has a population of approximately 566,400.
The county town is Belfast, other notable towns and cities in Antrim include:
... which we can conveniently complete the square[?]. To "complete the square" is to add a constant (i.e., in this case, a quantity that does not depend on x) to the expression ...