Punca kuasa dua untuk nombor 2: Perbezaan antara semakan

==Sejarah==

 

[[Image:Ybc7289-bw.jpg|right|thumb|200px|Tanah liat Babylon YBC 7289 dengan catatan.<br>(Imej oleh Bill Casselman)]]

Tablet tanah liat [[Babylon]] YBC 7289 (kk. 1800–1600 SM) memberikan anggaran <math>\sqrt{2}</math> dalam bentuk [[perenam-puluhan]], iaitu lebih kurang bentuk enam [[perpuluhan]]:<ref>Fowler and Robson, p. 368.<br>[http://it.stlawu.edu/%7Edmelvill/mesomath/tablets/YBC7289.html Photograph, illustration, and description of the ''root(2)'' tablet from the Yale Babylonian Collection]<br>[http://www.math.ubc.ca/%7Ecass/Euclid/ybc/ybc.html High resolution photographs, descriptions, and analysis of the ''root(2)'' tablet (YBC 7289) from the Yale Babylonian Collection]</ref>