分解因式(x^2-y)^2-(1-y)^2

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分解因式(x^2-y)^2-(1-y)^2分解因式(x^2-y)^2-(1-y)^2分解因式(x^2-y)^2-(1-y)^2(x²-y-1+y)(x²-y+1-y)(x²

分解因式(x^2-y)^2-(1-y)^2
分解因式(x^2-y)^2-(1-y)^2

分解因式(x^2-y)^2-(1-y)^2
(x²-y-1+y)(x²-y+1-y)
(x²-1)(x²-2y+1)
=(x-1)(x+1)(x²-2y+1)