-12x2 +14x +10 = 0
ax2 bx c = 0
a = -12
b = 14
c = 10
Δ = b2-4ac
Δ = 14² - (4 * -12 * 10)
Δ = 196 - (4*-120)
Δ = 196 - (-480)
Δ = 676 Δ > 0
-12x2+14x+10=0
x = -b ∓ √Δ 2a
x' = -14 - √676 2*-12 = -14 - 26.0 -24 = -40.0 -24 = 1.66666666667
x" = -14 + √676 2*-12 = -14 + 26.0 -24 = 12.0 -24 = -0.5
x' = 240.0
x" = -72.0
S = {x ∈ R / x' = 240.0, x" = -72.0 }