no.unnessesary ans plzzz
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Given, a + b + c = 0 can be written as
a + b = -c ---------------- (1)
n cubing both sides, we get
(a+b)^3 = (-c)^3
a^3 + b^3 + 3ab(a+b) = -c^3
a^3 + b^3 + c^3 = -3ab(a+b)
a^3 + b^3 + c^3 = -3ab(-c) (from (1))
a^3 + b^3 + c^3 = 3abc.
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