问题
填空题
分解因式:
(1)3x2+6x+3=______;
(2)x3y-9xy=______.
答案
(1)原式=3(x2+2x+1)=3(x+1)2;
(2)原式=xy(x2-9)=xy(x+3)(x-3);
故答案为:3(x+1)2;xy(x+3)(x-3).
分解因式:
(1)3x2+6x+3=______;
(2)x3y-9xy=______.
(1)原式=3(x2+2x+1)=3(x+1)2;
(2)原式=xy(x2-9)=xy(x+3)(x-3);
故答案为:3(x+1)2;xy(x+3)(x-3).