作业帮[(2/a-2b)+(1/a-b)]*[(a-2b)/(3a^2-ab-4b^2)]4x-2/x^2-x-2+(1-1/x+1)/x/x-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 10:33:05
![[(2/a-2b)+(1/a-b)]*[(a-2b)/(3a^2-ab-4b^2)]4x-2/x^2-x-2+(1-1/x+1)/x/x-1](/uploads/image/z/6801137-17-7.jpg?t=%5B%282%2Fa-2b%29%2B%281%2Fa-b%29%5D%2A%5B%28a-2b%29%2F%283a%5E2-ab-4b%5E2%29%5D4x-2%2Fx%5E2-x-2%2B%281-1%2Fx%2B1%29%2Fx%2Fx-1)
[(2/a-2b)+(1/a-b)]*[(a-2b)/(3a^2-ab-4b^2)]4x-2/x^2-x-2+(1-1/x+1)/x/x-1
[(2/a-2b)+(1/a-b)]*[(a-2b)/(3a^2-ab-4b^2)]
4x-2/x^2-x-2+(1-1/x+1)/x/x-1
[(2/a-2b)+(1/a-b)]*[(a-2b)/(3a^2-ab-4b^2)]4x-2/x^2-x-2+(1-1/x+1)/x/x-1
通分,再乘,得1/(a^2-b^2)