-4x2 -10x -6 = 0
ax2 bx c = 0
a = -4
b = -10
c = -6
Δ = b2-4ac
Δ = -10² - (4 * -4 * -6)
Δ = 100 - (4*24)
Δ = 100 - (96)
Δ = 4 Δ > 0
-4x2-10x-6=0
x = -b ∓ √Δ 2a
x' = 10 - √4 2*-4 = 10 - 2.0 -8 = 8.0 -8 = -1.0
x" = 10 + √4 2*-4 = 10 + 2.0 -8 = 12.0 -8 = -1.5
x' = -16.0
x" = -24.0
S = {x ∈ R / x' = -16.0, x" = -24.0 }