(a²-2b)²-(1-2b)² 因式分解

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(a²-2b)²-(1-2b)² 因式分解

(a²-2b)²-(1-2b)²
=[(a²-2b)+(1-2b)][(a²-2b)-(1-2b) ]
=(a²-4b+1)(a²-1)
=(a²-4b+1)(a+1) (a-1)