已知(a+b)²+|2b-1|=0,求6ab-2ab-3(ab-1)的值
问题描述:
已知(a+b)²+|2b-1|=0,求6ab-2ab-3(ab-1)的值
答
由题意得
a+b=0 a=-b
2b-1=0 b=0.5 所以a=-0.5
6ab-2ab-3(ab-1)
=ab+3
=0.5*(-0.5)+3
=2.75