(9a^2-6a+1)/(1-3a) /代表除以

问题描述:

(9a^2-6a+1)/(1-3a) /代表除以
单项式处以单项式,

(9a^2-6a+1)/(1-3a)
=(1-3a)^2/(1-3a)
=1-3a