m²+4m-5>0(m+5)(m-1)>0m>1或m<-5[4(m-1)²-4(m²+4m-5)×3]>04m²-8m+4-12m²-48m+60>0-8m²-56m+64>0m²+7m-8<0(m+8)(m-1)<0m>1或m<-8综上，m>1或m<-8
结果为：1≤m<19.
