2x²-3x/2+1/4 = 0 > Multiplica tudo por 4
8x² - 6x + 1 = 0
Δ = (-6)² - 4.8.1
Δ = 36 - 32
Δ = 4
x' = (6 + √4)/2*8
x' = 8/16 = 1/2
x'' = (6 - √4)/2*8
x'' = 4/16 = 1/4
S = {1/4,1/2}