Square root of 2

Unique positive real number which when multiplied by itself gives 2

The square root of 2 (approximately 1.4142) is the positive real number that, when multiplied by itself or squared, equals the number 2. It may be written as 2 {\displaystyle {\sqrt {2}}} or 2 1 / 2 {\displaystyle 2^{1/2}} . It is an algebraic number, and therefore not a transcendental number.

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