因式分解：（1）x^2-4y^2-2x+1 (2)9(2x-y)^2-6(2x+y)+1

(1) x^2-4y^2-2x+1
=(x-1)^2-4y^2
=(x-1+2y)(x-1-2y)
(2)9(2x-y)^2-6(2x+y)+1
={3(2x-y)-1}^2

(1)
=x^2-2x+1-(2y)^2
=(x-1)^2-(2y)^2
=(x-1+2y)*(x-1-2y)

(2)感觉你是不是题目抄错了
应该是9(2x-y)^2-6(2x-y)+1
=(6x-3y)^2-2(6x-3y)+1
=(6x-3y-1)^2
祝你学习进步

不懂