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X marks the unknown in algebra – but X's origins are a math mystery
The Conversation via Yahoo News· 9 months agoThe use of the letter x as a mathematical unknown is a relatively modern convention. Algebra has...
16 Easiest Second Languages To Learn For English Speakers
Insider Monkey via Yahoo Finance· 10 months agoIn this article, we will be taking a look at the 16 easiest second languages to learn for English...
