若3a*-a-2=0,则5+2a-6a*=( )
问题描述:
若3a*-a-2=0,则5+2a-6a*=( )
答
3a*-a-2=0 则3a*-a=2
5+2a-6a*=5-2(3a*-a)=5-4=1