Identity definition in math

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Identity (mathematics)

Identity 1: (a+b) 2 = a 2 + b 2 + 2ab. Identity 2: (a-b) 2 = a 2 + b 2 – 2ab. Identity 3: a 2 – b 2 = (a+b) (a-b)

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Algebraic Manipulation Identities

An identity element is a number that, when used in an operation with another number, results in the same number. The additive and multiplicative identities are two of the earliest identity

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