-4x2 +2x +6 = 0
ax2 bx c = 0
a = -4
b = 2
c = 6
Δ = b2-4ac
Δ = 2² - (4 * -4 * 6)
Δ = 4 - (4*-24)
Δ = 4 - (-96)
Δ = 100 Δ > 0
-4x2+2x+6=0
x = -b ∓ √Δ 2a
x' = -2 - √100 2*-4 = -2 - 10.0 -8 = -12.0 -8 = 1.5
x" = -2 + √100 2*-4 = -2 + 10.0 -8 = 8.0 -8 = -1.0
x' = 24.0
x" = -16.0
S = {x ∈ R / x' = 24.0, x" = -16.0 }