题目内容
把x4-2x2y2+y4分解因式,结果是( )
| A.(x-y)4 | B.(x2-y2)4 | C.[(x+y)(x-y)]2 | D.(x+y)2(x-y)2 |
原式=(x2-y2)2
=[(x+y)(x-y)]2
=(x+y)2(x-y)2
故选D.
=[(x+y)(x-y)]2
=(x+y)2(x-y)2
故选D.
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