railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Algebra Quadratic Equation

যদি α এবং β দ্বিঘাত সমীকরণ (5 + √2) x2 - (4 + √5) x + (8 + 2√5) = 0 -এর মূল হয়, তাহলে 2αβ/ (α + β) এর মান হল:

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7
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4
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8
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