(m+1)x^2+(1-2x)m=2
(m+1)^2-2mx+m-2=0
4mx^2-4*(m+1)(m-2)>0
m>-2
4m^2-4*(m+1)(m-2)=0
m=-2
4m^2-4*(m+1)(m-2)<0
m<-2