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Longhuyen94
2 năm trước
Cho ΔABC câm tại A. đường thwanrg BC có phương trình X+2Y-2=0. Đường cao kẻ từ B có pt X-Y+4=0, điểm M(-1,0) thuộc đường cao kẻ từ C. Tìm tọa độ A,B,C
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