Mathematics, 06.03.2021 15:00 Mordred7823

What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2

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What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2​

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What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2