If the roots of the equation a(b – c)x² + b(c – a)x + c(a – b) = 0 are equal, then which one of the following is correct? - NDA Mathematics 2019 (II)

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If the roots of the equation a(b – c)x² + b(c – a)x + c(a – b) = 0 are equal, then which one of the following is correct?