Factorise=125x³+8y³+z³-30xy
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Answer:
( 5x + 2y )³=
( 5x)³ + 3( 5x)²( 2y) + 3( 5x)( 2y)² + ( 2y)³ =
= 125x³ + 150x²y + 60xy² + 8y³
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