If a+b+c=0, then prove that (a^2+b^2+c^2)^2=2(a^4+b^4+c^4)
Really need a help. It blowed my mind. Was thinking 3 days.
Don't lose your sleep anymore ...I got the answer and i shall share with you..do you want it ?Just substitute a= -b-c in your equation on the left side and expand it as much as possible . Do the same with the right side..Then you get LHS=RHS..