-4x2 -4x +3 = 0
ax2 bx c = 0
a = -4
b = -4
c = 3
Δ = b2-4ac
Δ = -4² - (4 * -4 * 3)
Δ = 16 - (4*-12)
Δ = 16 - (-48)
Δ = 64 Δ > 0
-4x2-4x+3=0
x = -b ∓ √Δ 2a
x' = 4 - √64 2*-4 = 4 - 8.0 -8 = -4.0 -8 = 0.5
x" = 4 + √64 2*-4 = 4 + 8.0 -8 = 12.0 -8 = -1.5
x' = 8.0
x" = -24.0
S = {x ∈ R / x' = 8.0, x" = -24.0 }