问题
填空题
分解因式:x2-4y2+4y-1=______.
答案
x2-4y2+4y-1,
=x2-(4y2-4y+1),
=x2-(2y-1)2,
=(x+2y-1)(x-2y+1),
故答案为:(x+2y-1)(x-2y+1).
分解因式:x2-4y2+4y-1=______.
x2-4y2+4y-1,
=x2-(4y2-4y+1),
=x2-(2y-1)2,
=(x+2y-1)(x-2y+1),
故答案为:(x+2y-1)(x-2y+1).