-1x2 +4x -3 = 0
ax2 bx c = 0
a = -1
b = 4
c = -3
Δ = b2-4ac
Δ = 4² - (4 * -1 * -3)
Δ = 16 - (4*3)
Δ = 16 - (12)
Δ = 4 Δ > 0
-x2+4x-3=0
x = -b ∓ √Δ 2a
x' = -4 - √4 2*-1 = -4 - 2.0 -2 = -6.0 -2 = 3.0
x" = -4 + √4 2*-1 = -4 + 2.0 -2 = -2.0 -2 = 1.0
x' = 3.0
x" = 1.0
S = {x ∈ R / x' = 3.0, x" = 1.0 }