分解因式9(x+y+z)^2-(x-y-z)^2

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分解因式9(x+y+z)^2-(x-y-z)^2分解因式9(x+y+z)^2-(x-y-z)^2分解因式9(x+y+z)^2-(x-y-z)^29(x+y+z)²-(x-y-z)²=[

分解因式9(x+y+z)^2-(x-y-z)^2
分解因式9(x+y+z)^2-(x-y-z)^2

分解因式9(x+y+z)^2-(x-y-z)^2
9(x+y+z)²-(x-y-z)²
=[3(x+y+z)]²-(x-y-z)²
=[3(x+y+z)+(x-y-z)]×[3(x+y+z)-(x-y-z)]
=(4x+2y+2z)(2x+4y+4z)
=4(2x+y+z)(x+2y+2z)

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