x2-y2-z2+2yz 因式分解
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x2-y2-z2+2yz因式分解x2-y2-z2+2yz因式分解x2-y2-z2+2yz因式分解x^2-y^2-z^2+2yz=x^2-(y-z)^2=(x+y-z)(x-y+z)x2-y2-z2+2
x2-y2-z2+2yz 因式分解
x2-y2-z2+2yz 因式分解
x2-y2-z2+2yz 因式分解
x^2-y^2-z^2+2yz
=x^2-(y-z)^2
=(x+y-z)(x-y+z)
x2-y2-z2+2yz =x2-(y-z)2=(x+y-z)(x-y+z)
=x^2-(y-z)^2
=(x-y+z)(x+y-z)
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