2分之1(3a-4a-2)-4分之3(a方-2a-1)

问题描述:

2分之1(3a-4a-2)-4分之3(a方-2a-1)

2分之1(3a^2-4a-2)-4分之3(a^2-2a-1)
=3/2a^2-2a-1-3/4a^2+3/8a+3/4
=3/4a^2-13/8a-1/4