计算:(-1/2m²n-1/3mn+1)·(-1/4m³n).

问题描述:

计算:(-1/2m²n-1/3mn+1)·(-1/4m³n).

(-1/2m²n-1/3mn+1)·(-1/4m³n)
=1/8m的5次方n²+1/12m的4次方n²-1/4m³n