-12x2 +10x -2 = 0
ax2 bx c = 0
a = -12
b = 10
c = -2
Δ = b2-4ac
Δ = 10² - (4 * -12 * -2)
Δ = 100 - (4*24)
Δ = 100 - (96)
Δ = 4 Δ > 0
-12x2+10x-2=0
x = -b ∓ √Δ 2a
x' = -10 - √4 2*-12 = -10 - 2.0 -24 = -12.0 -24 = 0.5
x" = -10 + √4 2*-12 = -10 + 2.0 -24 = -8.0 -24 = 0.333333333333
x' = 72.0
x" = 48.0
S = {x ∈ R / x' = 72.0, x" = 48.0 }