-4x2 +3x +22 = 0
ax2 bx c = 0
a = -4
b = 3
c = 22
Δ = b2-4ac
Δ = 3² - (4 * -4 * 22)
Δ = 9 - (4*-88)
Δ = 9 - (-352)
Δ = 361 Δ > 0
-4x2+3x+22=0
x = -b ∓ √Δ 2a
x' = -3 - √361 2*-4 = -3 - 19.0 -8 = -22.0 -8 = 2.75
x" = -3 + √361 2*-4 = -3 + 19.0 -8 = 16.0 -8 = -2.0
x' = 44.0
x" = -32.0
S = {x ∈ R / x' = 44.0, x" = -32.0 }