问题
填空题
因式分9y2-6y+1=______;9m2n2-12mn+4=______.
答案
9y2-6y+1=(3y-1)2;9m2n2-12mn+4=(3mn-2)2.
故答案为:(3y-1)2;(3mn-2)2
因式分9y2-6y+1=______;9m2n2-12mn+4=______.
9y2-6y+1=(3y-1)2;9m2n2-12mn+4=(3mn-2)2.
故答案为:(3y-1)2;(3mn-2)2