SOLUTION: What is the coefficient of x^7 in the expansion of (2x+10)^10 ?

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Question 1103941: What is the coefficient of x^7 in the expansion of (2x+10)^10 ?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The term that includes x%5E7 is,
C%2810%2C3%29%2A%282x%29%5E7%2A10%5E3
.
.
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C%2810%2C3%29=120
So the coefficient is,
120%2A2%5E7%2A10%5E3=15360000