{"id":47551,"date":"2018-01-18T11:54:42","date_gmt":"2018-01-18T11:54:42","guid":{"rendered":"http:\/\/www.massarate.ma\/?p=47551"},"modified":"2018-01-18T11:54:42","modified_gmt":"2018-01-18T11:54:42","slug":"mathematiques-dou-vient-le-x","status":"publish","type":"post","link":"https:\/\/www.massarate.ma\/mathematiques-dou-vient-le-x.html","title":{"rendered":"Math\u00e9matiques : d\u2019o\u00f9 vient le X ?"},"content":{"rendered":"<p dir=\"ltr\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-47557\" src=\"http:\/\/www.massarate.ma\/wp-content\/uploads\/2018\/01\/x-s.jpg\" alt=\"Math\u00e9matiques : d\u2019o\u00f9 vient le X ?\" width=\"500\" height=\"312\" \/><\/p>\n<p dir=\"ltr\" style=\"text-align: justify;\">En math\u00e9matiques, on baptise \u00ab X \u00bb ce qu&#8217;on ne conna\u00eet pas. D&#8217;o\u00f9 vient cette habitude qui a m\u00eame envahi la justice avec les plaintes contre X et \u00e0 quoi sert-elle\u00a0? Petite histoire du\u00a0<em>x<\/em>.<\/p>\n<p dir=\"ltr\" style=\"text-align: justify;\">Ce \u00ab\u00a0X \u00bb\u00a0a une longue histoire. L&#8217;id\u00e9e de nommer l&#8217;inconnu vient de Diophante, un math\u00e9maticien grec du III<sup>e<\/sup>\u00a0si\u00e8cle qui l&#8217;a appel\u00e9\u00a0<em>arithmos<\/em>\u00a0(le nombre). La tradition de Diophante passa aux math\u00e9maticiens arabes du Moyen \u00c2ge, qui chang\u00e8rent le mot utilis\u00e9.<\/p>\n<p dir=\"ltr\" style=\"text-align: justify;\">Au IX<sup>e<\/sup>\u00a0si\u00e8cle, Al-Khawarizmi nommait l&#8217;inconnu\u00a0<em>shay<\/em>, ce qui signifie \u00ab\u00a0la chose\u00a0\u00bb. Les Andalous, alors sous influence arabe, \u00e9crivaient ce mot en caract\u00e8res latins\u00a0<em>xay<\/em>. Au XVII<sup>e<\/sup>\u00a0si\u00e8cle,\u00a0<span class=\"link-wrapper\">Ren\u00e9 Descartes<\/span>\u00a0simplifia ce terme en ne gardant que son initiale\u00a0<em>x<\/em>.<\/p>\n<p dir=\"ltr\"><span style=\"color: #808080;\">Futura-Sciences<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En math\u00e9matiques, on baptise \u00ab X \u00bb ce qu&#8217;on ne conna\u00eet pas. D&#8217;o\u00f9 vient cette habitude qui a m\u00eame envahi la justice avec les plaintes contre X et \u00e0 quoi sert-elle\u00a0? Petite histoire du\u00a0x. Ce \u00ab\u00a0X \u00bb\u00a0a une longue histoire. L&#8217;id\u00e9e de nommer l&#8217;inconnu vient de Diophante, un math\u00e9maticien grec du IIIe\u00a0si\u00e8cle qui l&#8217;a appel\u00e9\u00a0arithmos\u00a0(le [&hellip;]<\/p>\n","protected":false},"author":30,"featured_media":47557,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[469],"tags":[],"_links":{"self":[{"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/posts\/47551"}],"collection":[{"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/users\/30"}],"replies":[{"embeddable":true,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/comments?post=47551"}],"version-history":[{"count":0,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/posts\/47551\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/media\/47557"}],"wp:attachment":[{"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/media?parent=47551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/categories?post=47551"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.massarate.ma\/wp-json\/wp\/v2\/tags?post=47551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}