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iamgwenie26
2 năm trước
Bài 19 : Cho 2 đa thức sau : A = 2x ³ - 3x - 7x ² + 6 B = 5x - 14 - 7x ² + 2x ³ a) Sắp xếp đa thức theo lũy thừa giảm dần của biến b) Tính A + B; A - B c) Tìm nghiệm của đa thức A - B
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