-X²y+ 5X²y

来源：学生作业帮助网编辑：六六作业网时间：2024/05/04 18:13:14

-X²y+5X²y-X²y+5X²y-X²y+5X²y=4x²y-X²y+5X²y是同类项-X²y+

-X²y+ 5X²y
-X²y+ 5X²y

-X²y+ 5X²y
=4x²y
-X²y+ 5X²y是同类项

-X²y+ 5X²y=4x²y

原式=4x²y