Source: https://s0a05578cbddcd72c.jimcontent.com/download/version/1494523540/module/9791906752/name/Cours%20-%20Math%20R%C3%A9sum%C3%A9%20-%20Tome%20II%20-%20CH%2001%20et%2002%20-%20Nombres%20complexes%20-%20Bac%20Sciences%20exp%C3%A9rimentales%20-%20Bac%20Sciences%20exp%20%282016-2017%29%20Mr%20Benjeddou%20Saber.pdf