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2 năm trước
BÀI 5: Phân tích đa thức thành nhân tử. a/ 2x²- 2xy +3x- 3y b/x3- 4x² –xy² +4x c/ x3- 3x² –4x +12 d/3x-3y +2x²-2xy e/ x² -4x+4 f/x²-9y² g/ 9x²+6x+1 h/ x²- xy -5x+5y i/x³- 6x² –xy2 +9x
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