-6x2 +13x -2 = 0
ax2 bx c = 0
a = -6
b = 13
c = -2
Δ = b2-4ac
Δ = 13² - (4 * -6 * -2)
Δ = 169 - (4*12)
Δ = 169 - (48)
Δ = 121 Δ > 0
-6x2+13x-2=0
x = -b ∓ √Δ 2a
x' = -13 - √121 2*-6 = -13 - 11.0 -12 = -24.0 -12 = 2.0
x" = -13 + √121 2*-6 = -13 + 11.0 -12 = -2.0 -12 = 0.166666666667
x' = 72.0
x" = 6.0
S = {x ∈ R / x' = 72.0, x" = 6.0 }