计算m²(m-2)-4m(2-m)
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计算m²(m-2)-4m(2-m)
计算m²(m-2)-4m(2-m)
计算m²(m-2)-4m(2-m)
原式=m^3-2m^2-8m+4m^2=m^3+2m^2-8m=m(m^2+2m-8)=m(m-2)(m+4)
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