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Find the coefficient of y^4 in the expansion of (2y-5+3y^2)^6.

 Aug 8, 2024
 #1
avatar+1946 
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Here's the entire expansion (I have no life)

729y12+2916y112430y1019980y9+135y8+59976y7+6364y699960y5+375y4+92500y318750y237500y+15625

 

The answer is 375

 

Thanks! :)

 Aug 8, 2024
edited by NotThatSmart  Aug 8, 2024

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