Either there is a typo in your post or the book has the wrong answer.

Your answer is on the right track but can still be simplified further. Remember that m-n=-(n-m).

Results 1 to 3 of 3

- Jul 28th 2008, 01:17 PM #1

- Joined
- May 2008
- Posts
- 21

- Jul 28th 2008, 06:33 PM #2

- Joined
- Dec 2007
- From
- Melbourne
- Posts
- 428

- Jul 28th 2008, 10:46 PM #3

- Joined
- Nov 2005
- From
- someplace
- Posts
- 14,972
- Thanks
- 5