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trantrungicb1982
2 năm trước
Cho ctlhn cho ai trả lời đc Cho biểu thức A=(x+2/x-1- 2x^2+1/x^2-x) : x+2/x với x khác 0, x khác 1, x khác -2 a, CMR A= 1-x/x+2 b, Tính giá trị của A , biết x thỏa mãn x^2 - 3x=0
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