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tunghoang1902
2 năm trước
phân tích đa thức thành nhân tử 7)16a^2-(a^2+4)^2 8)1/4(a+1)^2-4/9(a-2)^2 9)(x^2+xy^2)-(y^2+xy)^2 10)12a^2b^2-3(a^2+b^2)^2 ai làm đc giúp em vs ạ em cho 5* vs trlhn ạ
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