Question

answer this question

Answer 1

a+b+c=0
=> a+b= -c
=>(a+b)^3= -c^3
=> a^3+b^3+3ab(a+b)= -c^3
=> a^3+b^3+3ab(-c)= -c^3
=>a^3+b^3-3abc=-c^3
=>a^3+b^3+c^3=3abc
( hence proved)
Hope it helps mate