因式分解:c^2 + 2ab - a^2 b^2 - 1

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因式分解:c^2+2ab-a^2b^2-1因式分解:c^2+2ab-a^2b^2-1因式分解:c^2+2ab-a^2b^2-1=c^2-(-2ab+a^2b^2+1)=c^2-(ab-1)^2=(c+

因式分解:c^2 + 2ab - a^2 b^2 - 1
因式分解:c^2 + 2ab - a^2 b^2 - 1

因式分解:c^2 + 2ab - a^2 b^2 - 1
=c^2 -(-2ab + a^2 b^2 +1)
=c^2-(ab-1)^2
=(c+ab-1)(c-ab+1)