fds

Asked by soniya | 20th Dec, 2012, 11:28: PM

Expert Answer:

(a+b+c)^2=0
or, a^2+b^2+c^2+2(a.b+b.c+c.a)=0
or, 2(a.b+b.c+c.a)=-3
or a.b+b.c+c.a=-3/2

Answered by  | 20th Dec, 2012, 11:35: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.