Respostas

2013-09-29T13:12:45-03:00
(2 - √5)²

(2²) - (
√5)²
 4   -   5

= - 1
1 3 1
2013-09-29T13:18:52-03:00
2-V5
(2-v5)²
(2²)-(v5)²
4-5
-1
1 3 1