# Binomal Expansion

1. Jun 9, 2008

### thomas49th

1. The problem statement, all variables and given/known data
Expand in ascending powers of x upto and including the term x³:

$$3(1-3x)^{-1} + 4(2+x)^{-2}$$

2. Relevant equations

3. The attempt at a solution

Err never done it with 2 terms like above before. Any suggestions/hints

Thanks :)

2. Jun 9, 2008

### rock.freak667

expand $(1-3x)^{-1}$ up to the term in $x^3$ and expand $(2+x)^{-2}$ as well up to the term in $x^3$, the just add them.