It should have been a = -1 and b = 2: I didn't read the diagram correctly.

14 - 1 - 4 = 9 which checks out.

The Z co-ordinate is 2 not -1.

Results 16 to 18 of 18

- Feb 2nd 2013, 12:30 AM #16

- Joined
- Sep 2012
- From
- Australia
- Posts
- 6,577
- Thanks
- 1711

- Feb 2nd 2013, 12:48 AM #17

- Joined
- Nov 2012
- From
- Singapore
- Posts
- 180

- Feb 2nd 2013, 12:49 AM #18

- Joined
- Sep 2012
- From
- Australia
- Posts
- 6,577
- Thanks
- 1711