5m(x-y)的2次方+10n(y-x)的3次方因式分解

日期：2011-04-10 10:55:34 人气：1

5m(x-y)²+10n(y-x)³ =5m(x-y)²-10n(x-y)³ =5(x-y)²[m-2n(x-y)] =5(x-y)²(m-2nx+2ny) =-5(x-y)²(2nx-2ny-m)