作业帮x^3-2x[2x^2-3(x^2-2x-3)]=3x^3+12^2+18x
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/27 13:46:57
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x^3-2x[2x^2-3(x^2-2x-3)]=3x^3+12^2+18x
x^3-2x[2x^2-3(x^2-2x-3)]=3x^3+12^2+18x
x^3-2x[2x^2-3(x^2-2x-3)]=3x^3+12^2+18x
x^3-2x[2x^2-3(x^2-2x-3)]=3x^3+12x^2+18x
x^3-2x[2x^2-3x^2+6x+9]=3x^3+12^2+18x
x^3-2x[-x^2+6x+9]=3x^3+12^2+18x
x^3+2x^3-12x^2-18x=3x^3+12^2+18x
3x^3-12x^2-18x=3x^3+12^2+18x
24x^2+36x=0
12x（2x+3）=0
x1=0 x2=-3/2
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