-12x2 -11x -2 = 0
ax2 bx c = 0
a = -12
b = -11
c = -2
Δ = b2-4ac
Δ = -11² - (4 * -12 * -2)
Δ = 121 - (4*24)
Δ = 121 - (96)
Δ = 25 Δ > 0
-12x2-11x-2=0
x = -b ∓ √Δ 2a
x' = 11 - √25 2*-12 = 11 - 5.0 -24 = 6.0 -24 = -0.25
x" = 11 + √25 2*-12 = 11 + 5.0 -24 = 16.0 -24 = -0.666666666667
x' = -36.0
x" = -96.0
S = {x ∈ R / x' = -36.0, x" = -96.0 }