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x + y = 20 এবং x - y = 4 হলে, $x^{4} - 2 x^{2} y^{2} + y^{4} = ?$

Created: 1 year ago | Updated: 1 year ago

Updated: 1 year ago

80

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অষ্টম শ্রেণি (মাধ্যমিক) গণিত অনুশীলনী ৪.১

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