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যদি

α + β = 3

α^{3} + β^{3} = 7

α

β

যে সমীকরণের মূল তা হলো-

x^{2} - 3 x + 7 = 0

9 x^{2} - 27 x + 20 = 0

9 x^{2} - 20 x + 27 = 0

3 x^{2} - 21 x + 20 = 0

3 x^{2} - 21 x + 21 = 0

ANS : 2

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