Factorise???????????????????

[From: ] [author: ] [Date: 11-11-08] [Hit: ]

a2-b2-2ab

(the 2 in a and a is squared)

a²-b²-2ab = (a-b)²

check:
(a-b)² = (a-b)(a-b) = a² -ab +b² -ab = a²-b²-2ab

keywords: Factorise,Factorise???????????????????