Factorise 25 a b 2 ab 2 July 8, 2019 16 32 64 128 Factorise 25 a b 2 16 ab 2 Factorise 25 a b 2 36 ab 2 Factorise 25 a 2 b 2 2ab Factorise 49 ab 2 25 a b 2 ( a+b)2