通分:1/x²-x,x/1-2x+x²,2/x²-x-2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 03:55:54
![通分:1/x²-x,x/1-2x+x²,2/x²-x-2](/uploads/image/z/8804469-21-9.jpg?t=%E9%80%9A%E5%88%86%EF%BC%9A1%2Fx%26%23178%3B-x%2Cx%2F1-2x%2Bx%26%23178%3B%2C2%2Fx%26%23178%3B-x-2)
通分:1/x²-x,x/1-2x+x²,2/x²-x-2
通分:1/x²-x,x/1-2x+x²,2/x²-x-2
通分:1/x²-x,x/1-2x+x²,2/x²-x-2
1/x²-x=1/x(x-1)=(x-1)(x-2)(x+1)/x(x-1)(x-1)(x-2)(x+1)
x/1-2x+x²=x/(x-1)(x-1)=x(x-2)(x+1)/x(x-1)(x-1)(x-2)(x+1)
2/x²-x-2=2/(x-2)(x+1)=2x(x-1)/x(x-1)(x-1)(x-2) (x+1)
2/x²-x-2 换成2/x²+x-2
1/x²-x=(x+2)(x-1)/x(x-1)²(x+2)
x/1-2x+x²=x²(x+2)/x(x-1)²(x+2)
2/x²+x-2=2x(x-1)/x(x-1)²(x+2)