Factorise 8x3 + 27y3+36x2y+54xy2
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8 x^3 + 27 y^3 + 36 x^2 y + 54 x y^2
= (2x)^3 + (3y)^3 + 3 * (2 x)( 3y) (2 x + 3y)
= (2 x + 3y)^3
= (2x)^3 + (3y)^3 + 3 * (2 x)( 3y) (2 x + 3y)
= (2 x + 3y)^3
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