Question

x²+x-1=0 me ajudem pfvvvvvvvvvvv​

Answer 1

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Δ = b² - 4.(a)(c) = Fórmula de Báskara

Δ = 1² - 4(1) ( -1)

Δ = 1 + 4

Δ = 5

x = - b + ou - √Δ / 2a

x = -1 + ou -  √5 / 2

x1 = 1+ √5 / 2

x2 = 1 -  √5 / 2

S = 1 +  √5 / 2 e 1 -  √5 / 2

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