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Solnce55 [7]
3 years ago
11

What is the coefficient of x2 in the expansion of (x + 2)3?

Mathematics
1 answer:
wolverine [178]3 years ago
4 0
One way is that you can just factor it out: (x+2)(x+2)(x+2)
For the first pair, you get x^2+4x+4.
Then do (x^2+4x+4)*(x+2)
That will be x^3+6x^2+12x+8
So the answer is 6
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