若(x-y)(x+y)M=x^4-2x²y²+y^4,则M=

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若(x-y)(x+y)M=x^4-2x²y²+y^4,则M=
若(x-y)(x+y)M=x^4-2x²y²+y^4,则M=

若(x-y)(x+y)M=x^4-2x²y²+y^4,则M=
(x-y)(x+y)M=x^4-2x²y²+y^4
M=(x^4-2x²y²+y^4)/[(x-y)(x+y)]
M=[(x²-y²)²]/[(x-y)(x+y)]
M=[(x-y)²(x+y)²]/[(x-y)(x+y)]
M=(x-y)(x+y)
M=x²-y²
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