-4x2 -2x +2 = 0
ax2 bx c = 0
a = -4
b = -2
c = 2
Δ = b2-4ac
Δ = -2² - (4 * -4 * 2)
Δ = 4 - (4*-8)
Δ = 4 - (-32)
Δ = 36 Δ > 0
-4x2-2x+2=0
x = -b ∓ √Δ 2a
x' = 2 - √36 2*-4 = 2 - 6.0 -8 = -4.0 -8 = 0.5
x" = 2 + √36 2*-4 = 2 + 6.0 -8 = 8.0 -8 = -1.0
x' = 8.0
x" = -16.0
S = {x ∈ R / x' = 8.0, x" = -16.0 }