Question 1104786
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The expression is {{{(sqrt(x)-3/sqrt(x))^8}}}<br>
The x term in the expansion will be obtained when the first term is used 2 more times than the second term: {{{(sqrt(x))^5*(1/sqrt(x))^3 = x^(5/2-3/2) = x}}}<br>
So the binomial formula tells us the coefficient is<br>
{{{C(8,3)*((1)^5)*((-3)^3) = 56(1)(-27) = -1512}}}