Respostas

2014-08-17T14:25:48-03:00
4x² - 2x = 6x - 4
4x² - 2x - 6x + 4 = 0
4x² - 8x + 4

Δ = 64 - 64 = 0

x = 8 +- 0
         8

x = 8/8 = 1
2 5 2