问题
填空题
分解因式:(1)a2+4a+4=_________________;(2)x3y-9xy=___________________.
答案
(1)(a+2)2;(2)xy(x+3)(x-3)
(1)a2+4a+4=(a+2)2;(2)x3y-9xy=xy(x2-9)=xy(x+3)(x-3)
分解因式:(1)a2+4a+4=_________________;(2)x3y-9xy=___________________.
(1)(a+2)2;(2)xy(x+3)(x-3)
(1)a2+4a+4=(a+2)2;(2)x3y-9xy=xy(x2-9)=xy(x+3)(x-3)