因式分解3xy²-6xy²+9y³是3x²y-6xy²+9y³
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 09:09:28
![因式分解3xy²-6xy²+9y³是3x²y-6xy²+9y³](/uploads/image/z/1637990-62-0.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A33xy%26%23178%3B-6xy%26%23178%3B%2B9y%26%23179%3B%E6%98%AF3x%26%23178%3By-6xy%26%23178%3B%2B9y%26%23179%3B)
因式分解3xy²-6xy²+9y³是3x²y-6xy²+9y³
因式分解3xy²-6xy²+9y³
是3x²y-6xy²+9y³
因式分解3xy²-6xy²+9y³是3x²y-6xy²+9y³
3x²y-6xy²+9y³
=3y(x²-2xy+y²+2y²)
=3y[(x-y)²+2y²]
=3y[(x-y)²-(-2)y²]
=3y[x-y-√(-2)y][x-y+√(-2)y]
前面两项可以合并,确定没有输入错误?
3xy²-6xy²+9y³=-3xy2+9y3
=3y^2(3y-x)
这个还真的不懂的啊