Question

Calcule com ∆=b²-4.a.c
X=-b±√∆
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2.a

6x²+x-1=0

Answer 1

a = 6; b = 1; c = -1

Δ = 1² - 4 · 6 · (-1)

Δ = 1 - 24 · (-1)

Δ = 1 + 24

Δ = 25

x₁ = $\frac{1 + \sqrt{25}}{2.6}$

x₁ = $\frac{1 + 5}{12}$

x₁ = 6 ÷ 12

x₁ = $\frac{1}{2}$

x₂ = $\frac{1 - 5}{12}$

x₂ = - 4 ÷ 12

x₂ = $\frac{-1}{3}$