the.com/square root

The number that commits to itself twice just to become another number.

means The value that, multiplied by itself, produces a given number.

from 'Root' here descends from mathematical Latin and French usage (radix, racine) picturing a number as a plant growing from an underlying root — the root being the thing from which the square 'grows.' The square root symbol (√) likely evolved from a stylized lowercase 'r,' standing for the Latin radix, scribbled by medieval and Renaissance mathematicians copying texts by hand; the small flag on top is thought to come from a bar once drawn over the whole expression to show what was included under the root.

symbol origin
radical sign evolved from a lowercase r
negative numbers
need imaginary i to get square roots
ancient babylon
approximated root 2 scarily accurately by 1800 BC
irrationality proof
root 2 broke pythagoreans mathematical worldview
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