: Mathématiques: square root of 2

number > mathematical constant > square root of 2

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square root of 2

The square root of 2 (approximately 1.4142) is a positive real number that, when multiplied by itself, equals the number 2. It may be written in mathematics as ${\\displaystyle {\\sqrt {2}}}$ or ${\\displaystyle 2^{1/2}}$ . It is an algebraic number, and therefore not a transcendental number. Technically, it should be called the principal square root of 2, to distinguish it from the negative number with the same property.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Square_root_of₂)

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https://en.wikipedia.org/wiki/Square_root_of₂

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https://fr.wikipedia.org/wiki/Racine_carr%C3%A9e_de_deux

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