a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急用.
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a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急用.a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急用.a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急
a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急用.
a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解
急用.
a^2b^2+x^2y^2-a^2x^2-b^2y^2因式分解急用.
a^2b^2+x^2y^2-a^2x^2-b^2y^2
=(a^2b^2-a^2x^2)-(b^2y^2-x^2y^2)
=a²(b^2-x^2)-y²(b²-x²)
=(a²-y²)(b²-x²)
=(a+y)(a-y)(b+x)(b-x)
a²b²+x²y²-a²x²-b²y²
=(a²b²-a²x²)-(b²y²-x²y²)
=a²(b²-x²)-y²(b²-x²)
=(b²-x²)(a²-y²)
=(b+x)(b-x)(a+ya-y)
(a^2-y^2)(b^2-x^2)
通分 a/(y-x)^2,b/(x-y)(x+y)
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(x+y)(a-2b)
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