因式分解:a²-b²-2a+1

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因式分解:a²-b²-2a+1因式分解:a²-b²-2a+1因式分解:a²-b²-2a+1a²-b²-2a+1=(a&#

因式分解:a²-b²-2a+1
因式分解:a²-b²-2a+1

因式分解:a²-b²-2a+1
a²-b²-2a+1
=(a²-2a+1)-b²
=(a-1)²-b²
=(a-1+b)(a-1-b)