-12x2 -14x -2 = 0
ax2 bx c = 0
a = -12
b = -14
c = -2
Δ = b2-4ac
Δ = -14² - (4 * -12 * -2)
Δ = 196 - (4*24)
Δ = 196 - (96)
Δ = 100 Δ > 0
-12x2-14x-2=0
x = -b ∓ √Δ 2a
x' = 14 - √100 2*-12 = 14 - 10.0 -24 = 4.0 -24 = -0.166666666667
x" = 14 + √100 2*-12 = 14 + 10.0 -24 = 24.0 -24 = -1.0
x' = -24.0
x" = -144.0
S = {x ∈ R / x' = -24.0, x" = -144.0 }