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Math Help - Binomial Coefficients Help

  1. #1
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    Question Binomial Coefficients Help

    Hi, can anyone run me through the process of answering this question and explain each step to me.

    Find the coefficient of x^2 in the expression (x^2-3/x)^7

    Thanks.
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  2. #2
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    You have been given the solution.
    http://www.mathhelpforum.com/math-he...html#post80091
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  3. #3
    Bar0n janvdl's Avatar
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    That  \frac{3}{x} part... Is that part of the x value or y value?
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  4. #4
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    Quote Originally Posted by janvdl View Post
    That  \frac{3}{x} part... Is that part of the x value or y value?
    \left( {a + b} \right)^7 ,\quad \left( {x^2  - \frac{3}{x}} \right)^7 , \Rightarrow a = x^2 \;\& \;b =  - \frac{3}{x}
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