化简；[x+3/x+2]+[2-x/x平方-4]的值_数学解答

化简；[x+3/x+2]+[2-x/x平方-4]的值

人气：284 ℃　时间：2020-01-27 10:41:18

解答

原式=(x+3)/(x+2)-(x-2)/(x+2)(x-2)
=(x+3)/(x+2)-1/(x+2)
=(x+3-1)/(x+2)
=(x+2)/(x+2)
=1