Δ=(m-1)²+12(m+3)=m²-2m+1+12m+36=m²+10m+37=(m+5)²+12＞0恒成立；
∴恒友两个不等的根
m为任意实数,试说明关于x的方程x²-（m-1）-3（m+3）=0恒有两个不相等的实数根
m为任意实数,试说明关于x的方程x²-（m-1）-3（m+3）=0恒有两个不相等的实数根
数学人气：796 ℃时间：2019-09-20 05:27:47
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