Respostas

2013-09-17T22:15:10-03:00
5x² + 73x² + 2x = 0
78x² + 2x = 0
x (78x + 2) = 0
x = 0

78x + 2 = 0
78.x = -2
x = -2 / 78
x = -1 / 39
1 5 1