(x²-y)²-(2y-2)²(a²-2b)²-(1-2b)²多项式因式分解

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(x²-y)²-(2y-2)²
(a²-2b)²-(1-2b)²
多项式因式分解

(x²-y)²-(2y-2)²=(x²-y+2y-2)(x²-y-2y+2)=(x²+y-2)(x²-3y+2);
(a²-2b)²-(1-2b)²=(a²-2b+1-2b)(a²-2b-1+2b)=(a²-4b+1)(a+1)(a-1)