（-2m-1）*（3m-2）=?
问题描述：
（-2m-1）*（3m-2）=?
答
原式=-2m(3m-2)-(3m-2)
=-6m²+4m-3m+2
=-6m²+m+2
答
（-2m-1）*（3m-2）==-6m²+m+2
答
原式= - 6m² +4m - 3m+2
= -6m² +m+2
答
(-2m-1)(3m-2)=-6m²+m+2
答
原式=-(2m+1)(3m-2)
=-[6m^2-m-2]
=-6m^2+m+2