5x³-[3x²-(x-1)]去括号______

来源：学生作业帮助网编辑：作业帮时间：2024/05/06 05:03:25

5x³-[3x²-(x-1)]去括号______
5x³-[3x²-(x-1)]去括号______

5x³-[3x²-(x-1)]去括号______
5x³-[3x²-(x-1)] 从内到外
=5x³-(3x²-x+1)
=5x³-3x²+x-1
5x³-[3x²-(x-1)] 从外到内
=5x³-3x²+(x-1)
=5x³-3x²+x-1

2x的立方+x-1