问题
解答题
分解因式: (1)2xy-4x2y2-
(2)ab(x-y)3-ab(x-y). |
答案
(1)原式=-(4x2y2-2xy+
),1 4
=-(2xy-
)2;1 2
(2)原式=ab(x-y)[(x-y)2-1],
=ab(x-y)(x-y-1)(x-y+1).
分解因式: (1)2xy-4x2y2-
(2)ab(x-y)3-ab(x-y). |
(1)原式=-(4x2y2-2xy+
),1 4
=-(2xy-
)2;1 2
(2)原式=ab(x-y)[(x-y)2-1],
=ab(x-y)(x-y-1)(x-y+1).