-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 = -12.0 -24 = 0.5
x" = 14 + √676 2*-12 = 14 + 26.0 -24 = 40.0 -24 = -1.66666666667
x' = 72.0
x" = -240.0
S = {x ∈ R / x' = 72.0, x" = -240.0 }