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

 May 16, 2023
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Expand:        (2y - 5 + 3y^2)^6.

 

729 y^12 + 2916 y^11 - 2430 y^10 - 19980 y^9 + 135 y^8 + 59976 y^7 + 6364 y^6 - 99960 y^5 + 375 y^4 + 92500 y^3 - 18750 y^2 - 37500 y + 15625

 

Coefficient of y^4==+ 375

 May 16, 2023

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