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x^{2} - 7 x + 12 = 0

α

β

α + β

α β

মূলবিশিষ্ট সমীকরণ-

x^{2} - 19 x + 84 = 0

x^{2} + 14 x - 144 = 0

x^{2} - 14 x + 144 = 0

x^{2} + 19 x - 84 = 0

ANS : 1

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