show that (i am asking this question again as i have asked 3 hour and 45 min ago but answer from came so i am posting this 2nd time) |a b c | |b c a | =-1/2(a+b+c)[(a-b)^2+ (b-c)^2+ (c-a)^2] |c a b| Share with your friends Share 0 Arnab Gupta answered this 1 View Full Answer