posted by Gratefulmom
7 years 2 months 1 week ago • 608 views • 4:42
search results matching tag: funny explanation
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Why is 'x' the symbol for an unknown? In this short and funny talk, Terry Moore gives the surprising answer.
posted by randeepsamra 1 decade 1 year 3 weeks ago • 259 views • 3:58- 1