Whenever any real property is purchased by the board, the transfer or grant and conveyance of the property must be taken to the “city of Fargo for the use of the schools” and whenever any sale is made by the board, it must be so resolved and placed upon the records of the board. The conveyance must be executed, in the name of the city of Fargo, by the president of the board and attested to by the business manager. The president and the business manager may execute conveyances upon a sale or exchange, with or without full covenants or warranty, on behalf of the city.