(x²+y²)(x²-1+y²)-12 因式分解
问题描述:
(x²+y²)(x²-1+y²)-12 因式分解
答
(x²+y²)(x²-1+y²)-12
=(x²+y²)²-(x²+y²)-12
=(x²+y²-4)(x²+y²+3)