for identity standered identity or formula
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List of Standard Identities
The standard identities (algebraic), i.e., the standard identities of algebra are as follows:
(a + b)2 = a2 + b2 + 2ab
(a – b)2 = a2 + b2 – 2ab
(a + b)3 = a3 + b3 + 3ab(a + b) = a3 + b3 + 3a2b + 3ab2
(a – b)3 = a3 – b3 – 3ab(a – b) = a3 – b3 – 3a2b + 3ab2
(a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca
a3 – b3 = (a – b)(a2 + ab + b2)
a3 + b3 = (a + b)(a2 – ab + b2)
a3 + b3 + c3 – 3abc = (a + b + c)(a2 + b2 + c2 – ab – bc – ca)
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