(z²+1)²-4z(z²+1)+4z²分解因式怎么算,
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(z²+1)²-4z(z²+1)+4z²分解因式怎么算,
(z²+1)²-4z(z²+1)+4z²分解因式怎么算,
(z²+1)²-4z(z²+1)+4z²分解因式怎么算,
=【(z²+1)-2z】²
=(z²-2z+1)²
=【(z-1)²】²
=(z-1)⁴