Toán Lớp 8: Tìm x , biết
a) $x^{2}$+3x-18=0
b) $8x^{2}$+30x+7=0
c) $x^{3}$-$5x^{2}$+ 8x-4=0
d) $x^{3}$- $11x^{2}$ + 30x=0
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Toán Lớp 8: Tìm x , biết
a) $x^{2}$+3x-18=0
b) $8x^{2}$+30x+7=0
c) $x^{3}$-$5x^{2}$+ 8x-4=0
d) $x^{3}$- $11x^{2}$ + 30x=0
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