Question

Rozwiąż równanie X do3+X do2- 9x=0

Answer 1

x³ + x² - 9x = 0

x(x² + x - 9) = 0

Wynika z tego równania , że

x = 0 lub x² + x - 9 = 0

x² + x - 9 = 0

Δ = 1 + 36 = 37

√Δ = √37

x₁ = (-1-√37)/2

x₂ = (-1 + √37)/

(x - x₁)(x - x₂) = 0

x - x₁ = 0 lub x - x₂ = 0

x = x₁ lub x = x₂

x = 0 lub x = (-1-√37)/2 lub x = (-1 + √37)/2

Answer 2

x^3 +x^2 -9x = 0

x(x^2 +x -9) = 0

x = 0 lub

x^2 +x -9 = 0

D =b^2 -4ac

D =1+36 =37

VD = V37

x1 =(-b-VD)/2a

x1 =(-1-V37)/2

x2 =(-b+VD0/2a

x2 =(-1+V37)/2

 

x = 0  v  x =(-1-V37)/2   v   x =(-1+V37)/2