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Toán Lớp 8: x^2+6x+12=9 x^2+12x+70=15 x^4+3x^3+2x^2+x+1=0 20x^5+7x^6+4x^3=0

Home/ Toán Lớp 8: x^2+6x+12=9 x^2+12x+70=15 x^4+3x^3+2x^2+x+1=0 20x^5+7x^6+4x^3=0

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