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Factorise : 8x^3+y^3+27 z^3-18 x y z....

Factorise : `8x^3+y^3+27 z^3-18 x y z`.

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`8x^(3)+y^(3)+27z^(3)-18xyz=(2x)^(3)+(y)^93)+(3z)^(3)-3(2x)(y)(3z)`
`=(2x+y+3z)(4x^(2)+y^(2)+9z^(2)-2xy-6xz-3yz)`
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