已知数a满足a+a2+3a=0,求|a-1|+|a+1|.
问题描述:
已知数a满足a+
+
a2
=0,求|a-1|+|a+1|.
3
a
答
数a满足a+
+
a2
=0,
3
a
a=0,
|a-1|+|a+1|=1+1=2.