a方-5a+2因式分解怎么分解啊···好纠结···- =

问题描述:

a方-5a+2因式分解
怎么分解啊···好纠结···- =

a^2-5a+2
=(a-5/2)^2-17/4
=(a-5/2+√17/2)(a-5/2-√17/2)