[Ted talk] Why is "X" the unknown ?

Summary

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The X often we find everywhere, and we also learn this variable in the maths class, but x also we can find in the culture the X price, the X files, project X and Ted X. the professor Terry Moore has learning about 6 years. The  Arabic is turns out to be a supremely logical language. In Arabic to write sentence or phrase like crafting an equation. This because in one word have a lot of information. For example, the word Al-Jebr roughly translates to “ the system for reconciling disparate part”. After translate to English that word Al-jebr become Algebra. The sound of Arabic is not represent that are available in European language such as the letter Sheen =  the sound like SH, this the first letter of word shaian  that mean “something, some undefined, unknown thing”, in Arabic only adding al to make meaning unknow thing. The problem for Spanish scholar in translate the material of Arabic is letter sheen and word shaian cannot be rendered into Spanish because Spanish do not have SH sound. They borrow CK sound from classical Greek in the form of letter Kai. So, when Kai translate into a common European language to say Latin, they replace the Greek Kai with the Latin X. The conclusion of this is the reason of it that “X” is unknown because we cannot say sound  "SH " in Spanish.