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ax² + bx + c = 0 দ্বিঘাত সমীকরণ হলে- 

i. a≠0 

ii. নিশ্চায়ক = b2-4ac 

iii. সমীকরণটির মূল একটি 

নিচের কোনটি সঠিক?

Created: 5 months ago | Updated: 5 months ago
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