-6x2 +19x -8 = 0
ax2 bx c = 0
a = -6
b = 19
c = -8
Δ = b2-4ac
Δ = 19² - (4 * -6 * -8)
Δ = 361 - (4*48)
Δ = 361 - (192)
Δ = 169 Δ > 0
-6x2+19x-8=0
x = -b ∓ √Δ 2a
x' = -19 - √169 2*-6 = -19 - 13.0 -12 = -32.0 -12 = 2.66666666667
x" = -19 + √169 2*-6 = -19 + 13.0 -12 = -6.0 -12 = 0.5
x' = 96.0
x" = 18.0
S = {x ∈ R / x' = 96.0, x" = 18.0 }