化简x/(x-1)^2-1/(x-1)^22.x/x^2-4x+4-2/x^2-4-1/2x+43.m/m+3+ 6/m^2-9÷2/m-3

分类: 作业答案 • 2021-12-20 01:32:20

问题描述：

化简x/(x-1)^2-1/(x-1)^2
2.x/x^2-4x+4-2/x^2-4-1/2x+4
3.m/m+3+ 6/m^2-9÷2/m-3

答

1.1/x-1
2.x/()(x-2)(x+2)-2/(x+2)(x-2)-1/2(x-2)
=x+2/2(x-2)^2
3.
m/m+3+[b/(m-3)(m+3)×(m-3)(m+3)/2(m+3)]
=3+m/m+3
=1