View Single Post
Old 01-12-2011, 05:35 PM  
blackmonsters
Making PHP work
 
blackmonsters's Avatar
 
Industry Role:
Join Date: Nov 2002
Location: 🌎🌅🌈🌇
Posts: 20,530
Quote:
Originally Posted by Odysseus View Post
(a - b)^2 = (a - b)*(a - b) = a*a - a*b - b*a + b*b = a^2 - a*b - a*b + b^2 = a^2 - 2a*b + b^2

a^2 - 2*a*b + b^2 = (a - b)^2
I got this when I tried that :

(a - b)^2 = (a - b)*(a - b) = a(a - b) - b(a - b) = (a^2 - ab) - (ab - b^2) = a^2 - 2ab - b^2
__________________
Make Money with Porn
blackmonsters is offline   Share thread on Digg Share thread on Twitter Share thread on Reddit Share thread on Facebook Reply With Quote