Question

Define Identity and write any three identities​

Answer 1

Identity I: (a + b)2 = a2 + 2ab + b2. Identity II: (a – b)2 = a2 – 2ab + b2. Identity III: a2 – b2= (a + b)(a – b) Identity IV: (x + a)(x + b) = x2 + (a + b) x + ab. Identity V: (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca.