-6x2 +8x -2 = 0
ax2 bx c = 0
a = -6
b = 8
c = -2
Δ = b2-4ac
Δ = 8² - (4 * -6 * -2)
Δ = 64 - (4*12)
Δ = 64 - (48)
Δ = 16 Δ > 0
-6x2+8x-2=0
x = -b ∓ √Δ 2a
x' = -8 - √16 2*-6 = -8 - 4.0 -12 = -12.0 -12 = 1.0
x" = -8 + √16 2*-6 = -8 + 4.0 -12 = -4.0 -12 = 0.333333333333
x' = 36.0
x" = 12.0
S = {x ∈ R / x' = 36.0, x" = 12.0 }