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If c^(2) != ab and the roots of (c^(2)-a...

If `c^(2) != ab` and the roots of `(c^(2)-ab)x^(2)-2(a^(2)-bc)x+(b^(2)-ac)+0` are equal show that `a^(3)+b^(3)+c^(3)=3abc` (or) a = 0.

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