Math Help - Jordan form

1. Jordan form

What is the Jordan form of
A=(2 0 4
3 4 -1
1 2 3)
Thank you!

2. Maple

Maple gives
6 0 0
0 $\frac{1}{2}(3-i\sqrt{15})$ 0
0 0 $\frac{1}{2}(3+i\sqrt{15})$