-4x2 -6x +10 = 0
ax2 bx c = 0
a = -4
b = -6
c = 10
Δ = b2-4ac
Δ = -6² - (4 * -4 * 10)
Δ = 36 - (4*-40)
Δ = 36 - (-160)
Δ = 196 Δ > 0
-4x2-6x+10=0
x = -b ∓ √Δ 2a
x' = 6 - √196 2*-4 = 6 - 14.0 -8 = -8.0 -8 = 1.0
x" = 6 + √196 2*-4 = 6 + 14.0 -8 = 20.0 -8 = -2.5
x' = 16.0
x" = -40.0
S = {x ∈ R / x' = 16.0, x" = -40.0 }