Question 1117629
<br>
{{{(x-2/x)^6}}} =
{{{x^6 + 6*(x)^5*(-2/x)^1 + 15*(x)^4*(-2/x)^2}}} plus other terms.... =<br>
{{{x^6-12x^4+60x^2}}} plus other terms....<br>
The coefficient of x^4 in the expansion of<br>
{{{(2+3x^2)*(x^6-12x^4+60x^2)}}}<br>
is<br>
{{{(2)(-12)+3(60) = -24+180 = 156}}}