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1 + \sqrt{- 7}

হলে, সমীকরণটি কত?

x^{2} + 4 x^{2} + 5 x + 6 = 0

x^{2} - 2 x + 6 = 0

x^{2} - 2 x + 8 = 0

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ANSWER : 2

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