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Dung28
2 năm trước
Phân tích các đa thức sau thành nhân tử: A, x^2 - y^2 - z^2 - 2yz B, ab - b^2 -a + b C, 3x^3 - 12x^2 + 12x Đ, x^2 + 5x + 6
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