3(2a的二次方-2)-2(-5a+1)+2怎么化简

问题描述:

3(2a的二次方-2)-2(-5a+1)+2怎么化简

3(2a^2-2)-2(-5a+1)+2
=6a^2-6+10a-2+2
=6a^2+10a-6
=a^2+5/3a-1
=(a+5/6)^2-61/36