-6x2 -17x +23 = 0
ax2 bx c = 0
a = -6
b = -17
c = 23
Δ = b2-4ac
Δ = -17² - (4 * -6 * 23)
Δ = 289 - (4*-138)
Δ = 289 - (-552)
Δ = 841 Δ > 0
-6x2-17x+23=0
x = -b ∓ √Δ 2a
x' = 17 - √841 2*-6 = 17 - 29.0 -12 = -12.0 -12 = 1.0
x" = 17 + √841 2*-6 = 17 + 29.0 -12 = 46.0 -12 = -3.83333333333
x' = 36.0
x" = -138.0
S = {x ∈ R / x' = 36.0, x" = -138.0 }