-4x2 +14x -12 = 0
ax2 bx c = 0
a = -4
b = 14
c = -12
Δ = b2-4ac
Δ = 14² - (4 * -4 * -12)
Δ = 196 - (4*48)
Δ = 196 - (192)
Δ = 4 Δ > 0
-4x2+14x-12=0
x = -b ∓ √Δ 2a
x' = -14 - √4 2*-4 = -14 - 2.0 -8 = -16.0 -8 = 2.0
x" = -14 + √4 2*-4 = -14 + 2.0 -8 = -12.0 -8 = 1.5
x' = 32.0
x" = 24.0
S = {x ∈ R / x' = 32.0, x" = 24.0 }