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(2008•大庆)已知关于x的一元二次方程x2-m=2x有两个不相等的实数根,则...
(2008•大庆)已知关于x的一元二次方程x2-m=2x有两个不相等的实数根,则m的取值范围是( )
A.m>-1
B.m<-2
C.m≥0
D.m<0
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