x^2-4x+3/x^2+x-2大于0

问题描述:

x^2-4x+3/x^2+x-2大于0

x^2-4x+3/(x^2+x-2)>0
(x-1)(x-3)/(x-1)(x+2)>0
x不等于1,所以
(x-3)/(x+2)>0
即(x-3)(x+2)>0
解得x>3或x3或x