分解因式:3(x+y)(x-y)-6(y-x)²

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分解因式:3(x+y)(x-y)-6(y-x)²分解因式:3(x+y)(x-y)-6(y-x)²分解因式:3(x+y)(x-y)-6(y-x)²3(x+y)(x-y)-6

分解因式:3(x+y)(x-y)-6(y-x)²
分解因式:3(x+y)(x-y)-6(y-x)²

分解因式:3(x+y)(x-y)-6(y-x)²
3(x+y)(x-y)-6(y-x)²
=3(x+y)(x-y)-6(x-y)²
=3(x-y)(x+y-2(x-y))
=3(x-y)(3y-x)