(x²+y²)(x²-1+y²)-12 因式分解

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(x²+y²)(x²-1+y²)-12因式分解(x²+y²)(x²-1+y²)-12因式分解(x²+y

(x²+y²)(x²-1+y²)-12 因式分解
(x²+y²)(x²-1+y²)-12 因式分解

(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)