(y+1)(y²-y+1)+y(1+y)(1-y)

来源：学生作业帮助网编辑：六六作业网时间：2024/11/23 22:55:04

(y+1)(y²-y+1)+y(1+y)(1-y)(y+1)(y²-y+1)+y(1+y)(1-y)(y+1)(y²-y+1)+y(1+y)(1-y)=(y+1)(y&#

(y+1)(y²-y+1)+y(1+y)(1-y)
(y+1)(y²-y+1)+y(1+y)(1-y)

(y+1)(y²-y+1)+y(1+y)(1-y)
=(y+1)(y²-y+1+y-y²)
=y+1

y＋1
先提取y＋1···