问题
解答题
分解因式: (1)-x4+
(2)-8a2b+2a3+8ab2 |
答案
(1)-x4+
,1 16
=-(x4-
),1 16
=-(x2+
)(x2-1 4
),1 4
=-(x2+
)(x+1 4
)(x-1 2
);1 2
(2)-8a2b+2a3+8ab2,
=2a(a2-4ab+4b2),
=2a(a-2b)2.
分解因式: (1)-x4+
(2)-8a2b+2a3+8ab2 |
(1)-x4+
,1 16
=-(x4-
),1 16
=-(x2+
)(x2-1 4
),1 4
=-(x2+
)(x+1 4
)(x-1 2
);1 2
(2)-8a2b+2a3+8ab2,
=2a(a2-4ab+4b2),
=2a(a-2b)2.