Mato Grosso do Sul is one of the states of Brazil, located in the southwestern part of the country, in the jungles of Pantanal[?]. Like Mato Grosso, from which is was separated in 1975, Mato Grosso do Sul depends mainly on cattle-raising.
... 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 to the left of "=", that will ...