8 x cube + 27 y cube is equals to Z Cube + 18 X Y Z factorize
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8x^3 + 27y^3 =z^3+ 18xyz
0=z^3-8x^3-27y^3+18xyz
0=(z-2x-3y)^3
0=z^3-8x^3-27y^3+18xyz
0=(z-2x-3y)^3
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