计算.3X³-2X²-y²+5y+X²-5y+y²

来源：学生作业帮助网编辑：六六作业网时间：2025/01/18 11:50:23

计算.3X³-2X²-y²+5y+X²-5y+y²计算.3X³-2X²-y²+5y+X²-5y+y²

计算.3X³-2X²-y²+5y+X²-5y+y²
计算.3X³-2X²-y²+5y+X²-5y+y²

计算.3X³-2X²-y²+5y+X²-5y+y²
3X³-2X²-y²+5y+X²-5y+y²
=3X³-(2-1)X²+(y²-y²)+(5y-5y)
=3X³-X²