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Factorise 8x ^(3) + 36 x ^(2) y + 54 xy ...

Factorise `8x ^(3) + 36 x ^(2) y + 54 xy ^(2) + 27 y ^(3).`

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The correct Answer is:
`(2x+3y)(2x+3y)(2x+3y)`
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