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huonggiang11721
2 năm trước
Câu 1: Rút gọn biểu thức P = (x - y)^2 + (x + y)^2 – 2.(x + y)(x – y) – 4x^2 Câu 2 : Phân tích các đa thức sau thành nhân tử: a/ x^3 – x^2y + 3x – 3y ; b/ x^3 – 2x^2 – 4xy^2 + x ; c/ (x + 2)(x+3)(x+4)(x+5) – 8 giúppppppppppppppppppppppppp
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