SOLUTION: Find the coefficient of y^4 in the expansion of (2y - 5)^7. I first answer was 70000, but it was incorrect.

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Question 1164007: Find the coefficient of y^4 in the expansion of (2y - 5)^7.
I first answer was 70000, but it was incorrect.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


You got it wrong because the coefficient includes the sign.

John

My calculator said it, I believe it, that settles it