Toán Lớp 8: Rút gọn phân thức sau:
(x+3)-x(x-1)
___________
(x-1).(x+1)
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Toán Lớp 8: Rút gọn phân thức sau:
(x+3)-x(x-1)
___________
(x-1).(x+1)
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