Respostas

2014-02-07T00:01:07-02:00
(X+5)²=(X+3)²+6²

x
² + 2*x*5 + 5² = x² + 2*x*3 + 3² + 6²

x² + 10x + 25 = x² + 6x +9 + 36

x² + 10x - x² - 6x = 9 + 36 - 25

4x = 45 - 25

4x = 20 

x = 20/4 = 5
2 5 2