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Question

যে শর্তে

c^{2} + b x + a = 0

এর মূলগুলো বাস্তব ও সমান হবে তা হলো-

b^{2} - 4 a c = 0

b^{2} - 4 a c < 0

c^{2} - 4 a b > 0

b^{2} + 4 a c > 0

b^{2} - 2 a c = 0

ANS : 1

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