Question

Resolva a Equaçao

x²=x+1

Answer 1

x² = x + 1
x² - x - 1 = 0

a = 1; b = - 1; c = - 1

Δ = b² - 4ac
Δ = (-1)² - 4.1.(-1)
Δ = 1 + 4
Δ = 5

x = - b +/- √Δ = - (-1) +/- √5
           2a              2.1

x' = 1 +√5
        2

x" = 1 - √5
         2