题目内容
分解因式:
(1)x3y-9xy3
(2)4a2+8a+4.
(1)x3y-9xy3
(2)4a2+8a+4.
(1)x3y-9xy3
=xy(x2-9y2)
=xy(x+y)(x-y);
(2)4a2+8a+4
=4(a2+2a+1)
=4(a+1)2.
=xy(x2-9y2)
=xy(x+y)(x-y);
(2)4a2+8a+4
=4(a2+2a+1)
=4(a+1)2.
练习册系列答案
相关题目
题目内容