(x²+1)²-1因式分解

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(x²+1)²-1因式分解
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(x²+1)²-1因式分解
(x²+1)²-1因式分解

(x²+1)²-1因式分解
原式=X^4+1+2X^2-1
=(X^2+1)^2-1