-6x2 +23x -17 = 0
ax2 bx c = 0
a = -6
b = 23
c = -17
Δ = b2-4ac
Δ = 23² - (4 * -6 * -17)
Δ = 529 - (4*102)
Δ = 529 - (408)
Δ = 121 Δ > 0
-6x2+23x-17=0
x = -b ∓ √Δ 2a
x' = -23 - √121 2*-6 = -23 - 11.0 -12 = -34.0 -12 = 2.83333333333
x" = -23 + √121 2*-6 = -23 + 11.0 -12 = -12.0 -12 = 1.0
x' = 102.0
x" = 36.0
S = {x ∈ R / x' = 102.0, x" = 36.0 }