Respostas

2014-02-23T09:14:20-03:00
(3√2)² = (2a-1)² + 3²
18 = 4a² - 4a + 1 + 9
4a²-4a+1 = 9
(2a-1)² = 9
2a-1 = 3 ou 2a-1 = -3
a = 2 ou a = -1
1 5 1