2x-2加上x-1分之5 分式加减,_数学解答

2x-2加上x-1分之5 分式加减,

人气：281 ℃　时间：2020-05-13 14:49:55

解答

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)