问题
解答题
分解因式: (1)
(2)4xy2-4x2y-y3. |
答案
(1)
a2-1 5
b2,9 20
=
(4a2-9b2),1 20
=
(2a+3b)(2a-3b);1 20
(2)4xy2-4x2y-y3,
=-y(4x2-4xy+y2),
=-y(2x-y)2.
分解因式: (1)
(2)4xy2-4x2y-y3. |
(1)
a2-1 5
b2,9 20
=
(4a2-9b2),1 20
=
(2a+3b)(2a-3b);1 20
(2)4xy2-4x2y-y3,
=-y(4x2-4xy+y2),
=-y(2x-y)2.