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vuhoabacgiang81
2 năm trước
Giari các phương trình sau : a căn x^2-8x+16-3 = 0 b căn x-1 - căn x+1 = 2 c căn x+4-4cănx+ căn x+9-6cănx =1 d căn x^2-4x+4 - căn x^2-6x+9 = 1 e căn x-2cănx-1 - căn x-1 = 1
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