x-x分之2xy-y²我算出来是x分之x²-2xy-y²提负号出来也不对,怎么算出来?如果条件允许,请写纸上发过来好么,用键盘打的我可能无法理解,
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 08:15:39
![x-x分之2xy-y²我算出来是x分之x²-2xy-y²提负号出来也不对,怎么算出来?如果条件允许,请写纸上发过来好么,用键盘打的我可能无法理解,](/uploads/image/z/5413039-7-9.jpg?t=x-x%E5%88%86%E4%B9%8B2xy-y%26%23178%3B%E6%88%91%E7%AE%97%E5%87%BA%E6%9D%A5%E6%98%AFx%E5%88%86%E4%B9%8Bx%26%23178%3B%EF%BC%8D2xy%EF%BC%8Dy%26%23178%3B%E6%8F%90%E8%B4%9F%E5%8F%B7%E5%87%BA%E6%9D%A5%E4%B9%9F%E4%B8%8D%E5%AF%B9%2C%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA%E6%9D%A5%3F%E5%A6%82%E6%9E%9C%E6%9D%A1%E4%BB%B6%E5%85%81%E8%AE%B8%EF%BC%8C%E8%AF%B7%E5%86%99%E7%BA%B8%E4%B8%8A%E5%8F%91%E8%BF%87%E6%9D%A5%E5%A5%BD%E4%B9%88%EF%BC%8C%E7%94%A8%E9%94%AE%E7%9B%98%E6%89%93%E7%9A%84%E6%88%91%E5%8F%AF%E8%83%BD%E6%97%A0%E6%B3%95%E7%90%86%E8%A7%A3%EF%BC%8C)
x-x分之2xy-y²我算出来是x分之x²-2xy-y²提负号出来也不对,怎么算出来?如果条件允许,请写纸上发过来好么,用键盘打的我可能无法理解,
x-x分之2xy-y²
我算出来是x分之x²-2xy-y²
提负号出来也不对,怎么算出来?
如果条件允许,请写纸上发过来好么,用键盘打的我可能无法理解,
x-x分之2xy-y²我算出来是x分之x²-2xy-y²提负号出来也不对,怎么算出来?如果条件允许,请写纸上发过来好么,用键盘打的我可能无法理解,
=x²/x-(2xy-y²)/x
=[x²-(2xy-y²)]/x 注意小括号
=(x²-2xy+y²)/x
=(x-y)²/x