-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 = -12.0 -8 = 1.5
x" = -4 + √64 2*-4 = -4 + 8.0 -8 = 4.0 -8 = -0.5
x' = 24.0
x" = -8.0
S = {x ∈ R / x' = 24.0, x" = -8.0 }