Date: Apr 9, 2012 9:11 PM Author: twinkleone Subject: How to expand an algebraic expression using identities (Part-2) - Math Less In this video http://www.youtube.com/watch?v=LXXP1hkhuQs&context=C4c08e8cADvjVQa1PpcFMGwojogP03JA-6m_lOdcQUGS0ePph1Ax8=, the author have used the algebraic identities to expand the given algebraic expressions. An identity is an equality which is true for all values of the variables. These identities are also called the algebraic formula.