-3x2 +13x -10 = 0
ax2 bx c = 0
a = -3
b = 13
c = -10
Δ = b2-4ac
Δ = 13² - (4 * -3 * -10)
Δ = 169 - (4*30)
Δ = 169 - (120)
Δ = 49 Δ > 0
-3x2+13x-10=0
x = -b ∓ √Δ 2a
x' = -13 - √49 2*-3 = -13 - 7.0 -6 = -20.0 -6 = 3.33333333333
x" = -13 + √49 2*-3 = -13 + 7.0 -6 = -6.0 -6 = 1.0
x' = 30.0
x" = 9.0
S = {x ∈ R / x' = 30.0, x" = 9.0 }