计算x+2+x-2分之4_数学解答

计算x+2+x-2分之4

人气：189 ℃　时间：2020-03-26 05:47:56

解答

x+2+4/(x-2)
=(x+2)(x-2)/(x-2)+4/(x-2)
=(x²-4)/(x-2)+4/(x-2)
=(x²-4+4)/(x-2)
=x²/(x-2)