若|a-2|+〔b-1〕^2=0,求3ab*[ 6ab-3〔ab-1/2a^2b〕]的值
问题描述:
若|a-2|+〔b-1〕^2=0,求3ab*[ 6ab-3〔ab-1/2a^2b〕]的值
答
|a-2|+〔b-1〕^2=0,则a=2,b=1;
所以3ab*[ 6ab-3〔ab-1/2a^2b〕]
=3x2[6x2-3(2-1/2x4)]
=6x(12-0)
=72.