(3a-1)的平方-(12a-4)

问题描述:

(3a-1)的平方-(12a-4)
完整过程

你好

(3a-1)² -(12a-4)
=(3a-1)²-4(3a-1)
=(3a-1)(3a-1-4)
=(3a-1)(3a-5)

【数学辅导团】为您解答,不理解请追问,理解请及时选为满意回答!(*^__^*)谢谢!可是我的答案上算的是三项(3a-1)² -(12a-4)=(3a-1)²-4(3a-1)=(3a-1)(3a-1-4)=(3a-1)(3a-5)=9a²-3a-15a+5=9a²-18a+5