(y+1)(y²-y+1)+y(1+y)(1-y)

来源：学生作业帮助网编辑：作业帮时间：2024/05/11 12:28:21

(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···