Question

x²-2x-2=0 equacao do 2 grau me ajudem pfv

Answer 1

x² - 2 x - 2 = 0
Δ = b² - 4.a.c
Δ = (-2)² - 4 . 1 . -2
Δ = 4 + 8
Δ = 12 ⇒√12 = √3.4 = 2 √3
x = - b + ou - 2√3 / 2 .1
x = -(-2) + ou - 2√3 /2
x ´= 2 + 2√3  2  ⇒ 1 + √3
x ´´ = 2 - 2√3/2 ⇒ 1 - √3
S ={1-√3 ; 1 + √3 }