22x2 +14x -8 = 0
ax2 bx c = 0
a = 22
b = 14
c = -8
Δ = b2-4ac
Δ = 14² - (4 * 22 * -8)
Δ = 196 - (4*-176)
Δ = 196 - (-704)
Δ = 900 Δ > 0
22x2+14x-8=0
x = -b ∓ √Δ 2a
x' = -14 - √900 2*22 = -14 - 30.0 44 = -44.0 44 = -1.0
x" = -14 + √900 2*22 = -14 + 30.0 44 = 16.0 44 = 0.363636363636
x' = -484.0
x" = 176.0
S = {x ∈ R / x' = -484.0, x" = 176.0 }