Factories 27 xcube + y cube +ycube-9 xyz
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Answer:
27x³ + y² + z³-9xyz
= (3x)³ + (y)³ + (z)³ - 9xyz
= (3x)³ + (y)³ + (z)³-3x3xxyx z
Using identity:
a³ + b³ + c³-3abc = (a + b + c)(a² + b² + c²-ab- bc - ca) putting a = 3x, b = y, c = z
= (3x+y+z) (9x² + y² + z² − 3xy− yz-3zx)
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