(m^2-2m+3)(5m-1)求解答
问题描述：
(m^2-2m+3)(5m-1)求解答
还有3mn^2*1/2mn^2+3/2m(mn)^2急
答
=m^2*5m-m^2-2m*5m-2m*(-1)+3*5m+3*(-1)
=5m^3-m^2-10m^2+2m+15m-3
=5m^3-11m^2+17m-3