Question

分解因式3a的三方减4a加一

分解因式3a的三方减4a加一

Answer 1

(3aaa-3aa)+(3aa-4a+1)
=3aa(a-1)+（3a-1）（a-1）
=(3aa+3a-1)（a-1）

Answer 2

3a³-4a+1
=3(a³-a)-(a-1)
=3a(a+1)(a-1)-(a-1)
=(a-1)[3a(a+1)-1]
=(a-1)(3a²+3a-1)