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$(2 + \sqrt{3 i})$ মূল বিশিষ্ট দ্বিঘাত সমীকরণটি হল-

x^{2} + 4 x + 7

x^{2} - 4 x + 7 = 0

x^{2} + 4 x + 7 = 0

x^{2} - 7 x + 4 = 0

ANSWER : 2

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