将(x-y)看成一个因式,合并代数式(x-y)的平方+3(x-y)-2(x-y)的平方中的同类项,得什么?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 01:21:01
![将(x-y)看成一个因式,合并代数式(x-y)的平方+3(x-y)-2(x-y)的平方中的同类项,得什么?](/uploads/image/z/3794320-64-0.jpg?t=%E5%B0%86%EF%BC%88x-y%29%E7%9C%8B%E6%88%90%E4%B8%80%E4%B8%AA%E5%9B%A0%E5%BC%8F%2C%E5%90%88%E5%B9%B6%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%88x-y%29%E7%9A%84%E5%B9%B3%E6%96%B9%2B3%EF%BC%88x-y%29-2%EF%BC%88x-y%EF%BC%89%E7%9A%84%E5%B9%B3%E6%96%B9%E4%B8%AD%E7%9A%84%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E5%BE%97%E4%BB%80%E4%B9%88%3F)
将(x-y)看成一个因式,合并代数式(x-y)的平方+3(x-y)-2(x-y)的平方中的同类项,得什么?
将(x-y)看成一个因式,合并代数式(x-y)的平方+3(x-y)-2(x-y)的平方中的同类项,得什么?
将(x-y)看成一个因式,合并代数式(x-y)的平方+3(x-y)-2(x-y)的平方中的同类项,得什么?
(x-y)^2+3(x-y)-2(x-y)^2
=[(x-y)^2-2(x-y)^2]+3(x-y)
=-(x-y)^2+3(x-y)
=(x-y)[3-(x-y)^2]