Respostas

2014-01-30T14:45:10-02:00
√(a-3)² + (2-1)² = √(a-2)²+(2-4)²
√a² - 6a + 9 + 4 -4 +1 = √a² -4a + 4 +4 -16 + 16
√-6a + 10 = √-4a + 8
√-6a + 4a = √8 - 10
√-2a = √-2
2a = 2
a = 2/2
a = 1