-4x2 +6x -2 = 0
ax2 bx c = 0
a = -4
b = 6
c = -2
Δ = b2-4ac
Δ = 6² - (4 * -4 * -2)
Δ = 36 - (4*8)
Δ = 36 - (32)
Δ = 4 Δ > 0
-4x2+6x-2=0
x = -b ∓ √Δ 2a
x' = -6 - √4 2*-4 = -6 - 2.0 -8 = -8.0 -8 = 1.0
x" = -6 + √4 2*-4 = -6 + 2.0 -8 = -4.0 -8 = 0.5
x' = 16.0
x" = 8.0
S = {x ∈ R / x' = 16.0, x" = 8.0 }