92. Factorise the following using the identity a^2 – b^2 = (a + b) (a – b). (xxiii) x^4 – y^4 92. Factorise the following using the identity a^2 – b^2 = (a + b) (a – b). (xxiii) x^4 – y^4 July 27, 2021 Category: Chapter 14 - Factorisation , Chapter 9 - Algebraic [...]