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Math Help - Expanding question

  1. #1
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    Expanding question

    What does (x^3 - (3/x))^8 expand to?
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    When I tried computing the problem into the binomial calculator, it's not giving me an answer?
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  4. #4
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    Via Pascal's triangle your coefficents are 1,8,28,56,70,56,28,8,1

    Using these the expansion is...

     1\times (x^3)^8\times \left(\frac{-3}{x}\right)^0+8\times (x^3)^7\times \left(\frac{-3}{x}\right)^1+28\times (x^3)^6\times \left(\frac{-3}{x}\right)^2+\dots<br />

    Do you see the pattern?
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