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$x + y - z = 3$ এবং $x^{2} + y^{2} + z^{2} = 5$ হলে xy - yz -zx এর মান কোনটি?

Created: 1 year ago | Updated: 1 year ago

Updated: 1 year ago

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অষ্টম শ্রেণি (মাধ্যমিক) গণিত অনুশীলনী ৪.১

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