22x2 +3x -4 = 0
ax2 bx c = 0
a = 22
b = 3
c = -4
Δ = b2-4ac
Δ = 3² - (4 * 22 * -4)
Δ = 9 - (4*-88)
Δ = 9 - (-352)
Δ = 361 Δ > 0
22x2+3x-4=0
x = -b ∓ √Δ 2a
x' = -3 - √361 2*22 = -3 - 19.0 44 = -22.0 44 = -0.5
x" = -3 + √361 2*22 = -3 + 19.0 44 = 16.0 44 = 0.363636363636
x' = -242.0
x" = 176.0
S = {x ∈ R / x' = -242.0, x" = 176.0 }