化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=1,y=2,z=-3
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 12:24:57
![化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=1,y=2,z=-3](/uploads/image/z/2517623-71-3.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BC%882x%26%23179%3B-xyz%29-2%28x%26%23179%3B-y%26%23179%3B%2Bxyz%29%2B%28xyz-2y%26%23179%3B%EF%BC%89%2Cx%3D1%2Cy%3D2%2Cz%3D-3)
化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=1,y=2,z=-3
化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=1,y=2,z=-3
化简求值:(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³),x=1,y=2,z=-3
(2x³-xyz)-2(x³-y³+xyz)+(xyz-2y³)
= 2x³-xyz-2x³+2y³-2xyz+xyz-2y³
=--2xyz
=12