因式分解练习题,x²-y²-z²-2yz

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因式分解练习题,x²-y²-z²-2yz
因式分解练习题,
x²-y²-z²-2yz

因式分解练习题,x²-y²-z²-2yz
x²-y²-z²-2yz
=x²-(y²+z²+2yz)
=x²-(y+z)²
=(x+y+z)(x-y-z)

x²-y²-z²-2yz
=x²-(y²+z²+2yz)
=x²-(y+z)²
=(x+y+z)(x-y-z)