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If the roots of the equation (c^2-a b)x^...

If the roots of the equation `(c^2-a b)x^2-2(a^2-b c)x+b^2-a c=0` are equal, prove that either `a=0` or `a^3+b^3+c^3=3a b cdot`

A

a = 0

B

`a^(3) + b^(3) + c^(3) = - 3abc`

C

`a^(2) + b^(2) + c^(2) = 2abc`

D

none of these

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