Bài 36: Đa thức M = ab(a + b + c) – bc(b + c) + ca(c + a) được phân tích thành A. (a + b + c)(ab – bc – ac) B. (a + b + c)(ab + bc + ca) C. (a + b – c)(ab + bc + ac) D. (a + b + c)(ab – bc + ac)

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