Giải phương trình tích A.B = 0

Định nghĩa Phương trình tích là phương trình có dạng A.B = 0, trong đó A và B là hai biểu thức chứa ẩn (hoặc không chứa ẩn). Công thức / Quy tắc Theo tính chất của phép nhân: Tích…

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