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Toán Lớp 9: Tìm các số nguyên x<0 sao cho: $3x^{2}$ $+$ $x$ $<$ $0$

Home/ Toán Lớp 9: Tìm các số nguyên x<0 sao cho: $3x^{2}$ $+$ $x$ $<$ $0$

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