22x2 +3x -7 = 0
ax2 bx c = 0
a = 22
b = 3
c = -7
Δ = b2-4ac
Δ = 3² - (4 * 22 * -7)
Δ = 9 - (4*-154)
Δ = 9 - (-616)
Δ = 625 Δ > 0
22x2+3x-7=0
x = -b ∓ √Δ 2a
x' = -3 - √625 2*22 = -3 - 25.0 44 = -28.0 44 = -0.636363636364
x" = -3 + √625 2*22 = -3 + 25.0 44 = 22.0 44 = 0.5
x' = -308.0
x" = 242.0
S = {x ∈ R / x' = -308.0, x" = 242.0 }