-12x2 -x +6 = 0
ax2 bx c = 0
a = -12
b = -1
c = 6
Δ = b2-4ac
Δ = -² - (4 * -12 * 6)
Δ = 1 - (4*-72)
Δ = 1 - (-288)
Δ = 289 Δ > 0
-12x2-x+6=0
x = -b ∓ √Δ 2a
x' = 1 - √289 2*-12 = 1 - 17.0 -24 = -16.0 -24 = 0.666666666667
x" = 1 + √289 2*-12 = 1 + 17.0 -24 = 18.0 -24 = -0.75
x' = 96.0
x" = -108.0
S = {x ∈ R / x' = 96.0, x" = -108.0 }