Factorise : 1 - 4a^2 + 4ab - b^2 Share with your friends Share 0 Drishti Goel answered this 0 View Full Answer S Ramaratnam answered this 1 - 4a^2 + 4ab - b^2 = 1 - ( 4a^2 - 4ab + b^2 ) = 1 - ( (2a)^2 - 2(2a)(b) + (b)^2 ) = 1 - ( 2a -b)^2 = (1 + 2a -b)( 1 - 2a + b) 0
