Question

Resolva as equaçoes de 2º grau:
x(2x-1)+6=4(x+1)

Answer 1

x(2x - 1) + 6 = 4(x + 1)
2x² - x + 6 = 4x + 4
2x² - x - 4x + 6 - 4 = 0
2x² - 5x + 2 = 0
Δ = (-5)² - 4 . 2 . 2
Δ = 25 - 16
Δ = 4
x = (-(-5) +/- √4) / 2. 2
x' = (5 - 2)/4 = 3/4
x" = (5+2)/4 = 7/4