-1x2 +3x -2 = 0
ax2 bx c = 0
a = -1
b = 3
c = -2
Δ = b2-4ac
Δ = 3² - (4 * -1 * -2)
Δ = 9 - (4*2)
Δ = 9 - (8)
Δ = 1 Δ > 0
-x2+3x-2=0
x = -b ∓ √Δ 2a
x' = -3 - √1 2*-1 = -3 - 1.0 -2 = -4.0 -2 = 2.0
x" = -3 + √1 2*-1 = -3 + 1.0 -2 = -2.0 -2 = 1.0
x' = 2.0
x" = 1.0
S = {x ∈ R / x' = 2.0, x" = 1.0 }