-4x2 -2x +12 = 0
ax2 bx c = 0
a = -4
b = -2
c = 12
Δ = b2-4ac
Δ = -2² - (4 * -4 * 12)
Δ = 4 - (4*-48)
Δ = 4 - (-192)
Δ = 196 Δ > 0
-4x2-2x+12=0
x = -b ∓ √Δ 2a
x' = 2 - √196 2*-4 = 2 - 14.0 -8 = -12.0 -8 = 1.5
x" = 2 + √196 2*-4 = 2 + 14.0 -8 = 16.0 -8 = -2.0
x' = 24.0
x" = -32.0
S = {x ∈ R / x' = 24.0, x" = -32.0 }