[1+2x-4分号(x+1)(x-2)]÷x+3分号x^2 -1

分类: 作业答案 • 2021-12-23 11:10:02

问题描述：

[1+2x-4分号(x+1)(x-2)]÷x+3分号x^2 -1
要过程,急

答

=[1+2/(x+1)]/x+3/(X+1)(X-1)
=2+3/X+3/(X*X-1)
=2+3(X*X-1+X)/(X^3-x)
=(2X^3+3X^2+X-3)/(X^3-X)