SOLUTION: Find the ninth term in the expansion of (3a-b)^12 I have absolutely no idea how to do this. Please help.
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Question 38032: Find the ninth term in the expansion of (3a-b)^12 I have absolutely no idea how to do this. Please help. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Find the ninth term in the expansion of (3a-b)^12
The ninth terms is 12C8(3a)^8(-b)^(4)= 495(6561a^8)(b^4)
=3247695a^8b^4
Cheers,
Stan H.
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