25.关于xxx的方程x2+(m−1)x+m2−2=0x^{2}+(m-1)x+m^{2}-2=0x2+(m−1)x+m2−2=0的两个实根x1x_{1}x1,x2x_{2}x2.(1)若x1<−1x_{1}<-1x1<−1,x2>1x_{2}>1x2>1求实数mmm的取值范围;(2)若1<x1⩽x2<21<x_{1}\leqslant x_{2}<21<x1⩽x2<2,求实数mmm的取值范围.