撕裂重罪.终曲:因式分解(要步骤)

来源:百度文库 编辑:高校问答 时间:2024/05/07 12:41:25
(xy+1)(x+1)(y+1)+xy

(xy+1)(x+1)(y+1)+xy
=(xy+1)(xy+x+y+1)+xy
=(xy+1)[(xy+1)+x+y]+xy
=(xy+1)^2+x(xy+1)+y(xy+1)+xy
=(xy+1+x)(xy+1+y)