(x²+y²)(x²-1+y²)-12 因式分解

问题描述:

(x²+y²)(x²-1+y²)-12 因式分解

(x²+y²)(x²-1+y²)-12
=(x²+y²)²-(x²+y²)-12
=(x²+y²-4)(x²+y²+3)