3 years ago

Coefficient of x^2 in expansion of (x+2)^5

1 answer:

8 0

The x² term will be C(5,2)x²·2³ = 80x².

The coefficient is 80.

_____
C(n, k) = n!/(k!·(n-k)!)
C(5, 2) = 5·4/(2·1) = 10

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Vadim26 [7]

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3 years ago

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patriot [66]

Hey there!

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*The answer must have a positive sign.*

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Mashutka [201]

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