已知(a+b)2+|2b-1|=0,则 6ab-2ab-3(ab-1)=_.
问题描述:
已知(a+b)2+|2b-1|=0,则 6ab-2ab-3(ab-1)=______.
答
根据题意得,a+b=0,2b-1=0,
解得a=-
,b=1 2
,1 2
∴6ab-2ab-3(ab-1)
=6ab-2ab-3ab+3
=ab+3
=-
×1 2
+31 2
=2
.3 4
故答案为:2
.3 4