2x^2-4xy-y^2因式分解

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2x^2-4xy-y^2因式分解2x^2-4xy-y^2因式分解2x^2-4xy-y^2因式分解2x^2-4xy-y^2=2（x^2-2xy+y^2-y^2）-y^2=2(x-y)^2-3y^2=[√

2x^2-4xy-y^2因式分解
2x^2-4xy-y^2因式分解

2x^2-4xy-y^2因式分解
2x^2-4xy-y^2
=2（x^2-2xy+y^2-y^2）-y^2
=2(x-y)^2-3y^2
=[√2(x-y)-√3y)][√2(x-y)+√3y]
=[√2x-(√2+√3)y][√2x+(√3-√2)y]

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