（x－2分之x－x＋2分之x）÷2-x分之4x分式化简该怎么做

分类: 作业答案 • 2021-12-19 15:04:04

问题描述：

答

（x－2分之x－x＋2分之x）÷2-x分之4x
=[x/(x-2)－x/(x＋2)]÷ 4x/(2-x)
=x(x+2-x+2)/(x-2)(x＋2)* (2-x)/ 4x
=4x/(x-2)(x＋2)* (2-x)/ 4x
=-1/(x+2)

答

（x－2分之x－x＋2分之x）÷2-x分之4x
=[(x/(x-2)-x/(x+2)]÷4x/(2-x)
=[(x²+2x-x²+2x)/(x-2)(x+2)]*(2-x)/4x
=4x/(x-2)(x+2)*(2x-)/4x
=-1/(x+2)