SOLUTION: how to find the cube of 3x-1/3y please reply with steps

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Question 644178: how to find the cube of 3x-1/3y
please reply with steps
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how to find the cube of 3x-1/3y
please reply with steps
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%28a%2Bb%29%5E3+=+a%5E3+%2B+3a%5E2b+%2B+3ab%5E2+%2B+b%5E3
a = 3x, b = (-y/3)
%283x+-+y%2F3%29%5E3+=+27x%5E3+-+9x%5E2y+%2B+xy%5E2+-+y%5E3%2F27