Toán Lớp 7: Tìm x ∈ Q, biết
a) ( x + 1)(x – 2) < 0
b) (x – 2) (x + ) > 0 $\frac{2}{3}$
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Toán Lớp 7: Tìm x ∈ Q, biết
a) ( x + 1)(x – 2) < 0
b) (x – 2) (x + ) > 0 $\frac{2}{3}$
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