22x2 +12x -10 = 0
ax2 bx c = 0
a = 22
b = 12
c = -10
Δ = b2-4ac
Δ = 12² - (4 * 22 * -10)
Δ = 144 - (4*-220)
Δ = 144 - (-880)
Δ = 1024 Δ > 0
22x2+12x-10=0
x = -b ∓ √Δ 2a
x' = -12 - √1024 2*22 = -12 - 32.0 44 = -44.0 44 = -1.0
x" = -12 + √1024 2*22 = -12 + 32.0 44 = 20.0 44 = 0.454545454545
x' = -484.0
x" = 220.0
S = {x ∈ R / x' = -484.0, x" = 220.0 }