问题
解答题
分解因式: (1)a3-2a2b+ab2 (2)(x+1)(x+2)+
|
答案
(1)a3-2a2b+ab2,
=a(a2-2ab+b2),
=a(a-b)2;
(2)(x+1)(x+2)+
,1 4
=x2+3x+2+
,1 4
=x2+3x+
,9 4
=(x+
)2.3 2
分解因式: (1)a3-2a2b+ab2 (2)(x+1)(x+2)+
|
(1)a3-2a2b+ab2,
=a(a2-2ab+b2),
=a(a-b)2;
(2)(x+1)(x+2)+
,1 4
=x2+3x+2+
,1 4
=x2+3x+
,9 4
=(x+
)2.3 2