2x-2加上x-1分之5 分式加减,

分类: 作业答案 • 2021-12-31 11:55:32

问题描述：

2x-2加上x-1分之5 分式加减,

答

2x-2+5/(x-1)
=2(x-1)+5/(x-1)
=2(x-1)(x-1)/(x-1)+5/(x-1)
=(2x²-4x+2)/(x-1)+5/(x-1)
=(2x²-4x+2+5)/(x-1)
=(2x²-4x+7)/(x-1)