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