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# Binomial expansion question watch

1. f(x)=(2-x)^10

Given that x is small, and so terms of x^3 and higher powers of x can be ignored:

a) Find an approximation for f(x) in the form A+Bx+Cx^2.

Am i wrong to think you're meant to essentially do (2-x)^2?? The answer given does something completely different.
2. basically you expand that as you would any other binomial expansion but only go up to the x^2 term
3. (Original post by Howie_2114)
basically you expand that as you would any other binomial expansion but only go up to the x^2 term
Ahh right I see! Thank you indeed.

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Updated: February 21, 2018
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