# Binomal Expansion

## Homework Statement

Expand in ascending powers of x upto and including the term x³:

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

## The Attempt at a Solution

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

Thanks :)

## Answers and Replies

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rock.freak667
Homework Helper
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.