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tnn5435
2 năm trước
Rút gọn các biểu thức sau: B= |- 3x^2| - 8x^2 + |x-2| khi x lớn hơn hoặc bằng 2 D= |-3x-2| -8x^2 + x-2 khi x bé hơn hoặc bằng -2/3
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